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An evaporator includes a housing, a bottle containing a substance to be evaporated, a wick having a lower portion disposed within the bottle and an upper portion protruding from the bottle, a heating device disposed within the housing at a position proximate to the upper portion of the wick, and an

An evaporator includes a housing, a bottle containing a substance to be evaporated, a wick having a lower portion disposed within the bottle and an upper portion protruding from the bottle, a heating device disposed within the housing at a position proximate to the upper portion of the wick, and an adjustment mechanism within the housing for displacing at least the upper portion of the wick toward or away from the heating device in a direction substantially perpendicular to the longitudinal axis of the wick. In a preferred embodiment, the adjustment mechanism includes a hollow cylindrical portion that engages the upper portion of the wick, and a dial portion for rotating the hollow cylindrical portion about an axis of rotation.

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1. An evaporator, for use with a bottle containing a substance to be evaporated and a wick that has its lower portion disposed within the bottle and its upper portion protruding from the bottle, the evaporator comprising:a housing; a heating device disposed within the housing at a position proximate

1. An evaporator, for use with a bottle containing a substance to be evaporated and a wick that has its lower portion disposed within the bottle and its upper portion protruding from the bottle, the evaporator comprising:a housing; a heating device disposed within the housing at a position proximate to the upper portion of the wick; and an adjustment mechanism within the housing for displacing at least the upper portion of the wick toward or away from the heating device in a direction substantially perpendicular to the longitudinal axis of the wick. 2. The evaporator of claim 1, wherein the adjustment mechanism includes an opening through which the wick extends.3. The evaporator of claim 1, wherein the bottle is detachably engaged within the housing.4. The evaporator of claim 1, wherein the substance to be evaporated is one of an insecticide, a fragrance, or an odor eliminator.5. The evaporator of claim 1, wherein the adjustment mechanism includes a hollow cylindrical portion that surrounds at least part of the upper portion of the wick and a dial portion for rotating the hollow cylindrical portion about an axis of rotation.6. The evaporator of claim 5, wherein the dial portion is formed integrally with the hollow cylindrical portion.7. The evaporator of claim 5, wherein the hollow cylindrical portion is rotatable through a range of rotation of about 75 degrees.8. The evaporator of claim 5, wherein the hollow cylindrical portion defines an opening through which the wick extends, and the center of the opening is offset relative to the axis of rotation of the hollow cylindrical portion.9. The evaporator of claim 5, wherein the adjustment mechanism further includes a plurality of tapered lugs disposed on an inner surface of the hollow cylindrical portion in contact with the upper portion of the wick.10. The evaporator of claim 3, wherein the distance between the upper portion of the wick and the heating device can be varied by about 1 mm to about 3.5 mm.11. The evaporator of claim 10, wherein the distance between the upper portion of the wick and the heating device can be varied by about 2 mm.12. The evaporator of claim 5, further comprising a sheath encasing at least part of the upper portion of the wick.13. The evaporator of claim 3, further comprising a fan disposed within the housing.14. The evaporator of claim 1, further comprising an electrical plug for supplying power to the heating device and for supporting the evaporator in a wall outlet.15. The evaporator of claim 14, wherein the electrical plug is rotatable in order to support the evaporator in an upright position in both horizontal and vertical wall outlets.16. An evaporator, comprising:a housing; a bottle containing a substance to be evaporated; a wick, having a lower portion disposed within the bottle and an upper portion protruding from the bottle, for drawing the substance to be evaporated toward the upper portion of the wick; means for heating the upper portion of the wick to evaporate the substance; means for positioning the upper portion of the wick relative to the heating means; and means for displacing at least the upper portion of the wick toward or away from the heating means in a direction substantially perpendicular to the longitudinal axis of the wick. 17. The evaporator of claim 16, wherein the bottle is detachably engaged within the housing.18. The evaporator of claim 16, wherein the substance to be evaporated is one of an insecticide, a fragrance, or an odor eliminator.19. The evaporator of claim 16, wherein the displacing means includes:a hollow cylindrical portion that surrounds at least part of the upper portion of the wick; and a dial portion for rotating the hollow cylindrical portion about an axis of rotation. 20. The evaporator of claim 19, wherein the dial portion is formed integrally with the hollow cylindrical portion.21. The evaporator of claim 19, wherein the hollow cylindrical portion is rotatable through a range of rotation of about 75 degrees.22. The evaporator of claim 19, wherein the hollow cylindrical portion defines an opening through which the wick extends, and the center of the opening is offset relative to the axis of rotation of the hollow cylindrical portion.23. The evaporator of claim 19, wherein the displacing means further includes a plurality of tapered lugs disposed on an inner surface of the hollow cylindrical portion in contact with the upper portion of the wick.24. The evaporator of claim 19, wherein the distance between the upper portion of the wick and the heating means can be varied by about 1 mm to about 3.5 mm.25. The evaporator of claim 19, wherein the distance between the upper portion of the wick and the heating means can be varied by about 2 mm.26. The evaporator of claim 19, further comprising a fan disposed within the housing.27. The evaporator of claim 16, further comprising a sheath encasing at least part of the upper portion of the wick.28. The evaporator of claim 16, further comprising an electrical plug for supplying power to the heating means and for supporting the evaporator in a wall outlet.29. The evaporator of claim 16, wherein the electrical plug is rotatable in order to support the evaporator in an upright position in both horizontal and vertical wall outlets.30. A plug-in evaporator for vaporizing a liquid formulation, comprising:a bottle containing a liquid formulation; a wick, having a lower portion disposed within the bottle and an upper portion protruding from the bottle, for drawing the liquid formulation from the bottle toward the upper portion of the wick; and a housing in which the bottle is retained, the housing including (i) an electrical heating device positioned proximate to the upper portion of the wick, (ii) an electrical plug for supplying power to the heating device and for supporting the evaporator in a wall outlet, and (iii) an adjustment mechanism for displacing the upper portion of the wick toward or away from the heating device in a direction substantially perpendicular to the longitudinal axis of the wick. 31. The evaporator of claim 30, wherein the adjustment mechanism includes an opening through which the wick extends.32. The evaporator of claim 30, wherein the bottle is detachably retained within the housing.33. The evaporator of claim 30, wherein the liquid formulation is one of an insecticide, a fragrance, or an odor eliminator.34. The evaporator of claim 30, wherein the adjustment mechanism includes a hollow cylindrical portion that surrounds at least part of the upper portion of the wick and a dial portion for rotating the hollow cylindrical portion about an axis of rotation.35. The evaporator of claim 34, wherein the dial portion is formed integrally with the hollow cylindrical portion.36. The evaporator of claim 34, wherein the hollow cylindrical portion is rotatable through range of rotation of about 75 degrees.37. The evaporator of claim 34, wherein the hollow cylindrical portion defines an opening through which the wick extends, and the center of the opening is offset relative to the axis of rotation of the hollow cylindrical portion.38. The evaporator of claim 34, wherein the distance between the upper portion of the wick and the heating device can be varied by about 1 mm to about 3.5 mm.39. The evaporator of claim 38, wherein the distance between the upper portion of the wick and the heating device can be varied by about 2 mm.40. The evaporator of claim 34, further comprising a sheath encasing at least part of the upper portion of the wick.41. The evaporator of claim 34, wherein the housing further includes a fan.42. The evaporator of claim 34, wherein the adjustment mechanism further includes a plurality of tapered lugs disposed on an inner surface of the hollow cylindrical portion in contact with the upper portion of the wick.43. The evaporator of claim 30, wherein the electrical plug is rotatable in order to support the evaporator in an upright position in both horizontal and vertical wall outlets.44. A plug-in evaporator for dispersing a chemical active into a surrounding environment, comprising:a bottle containing a liquid formulation; a wick, having a lower portion disposed within the bottle and an upper portion protruding from the bottle, for drawing the liquid formulation from the bottle toward the upper portion of the wick; a housing in which the bottle is detachably retained; an electrical heating device disposed within the housing at a position proximate to the upper portion of the wick; an electrical plug extending from the housing for supplying power to the heating device and for supporting the evaporator in a wall outlet; and an adjustment mechanism within the housing for displacing the upper portion of the wick toward or away from the heating device in a direction substantially perpendicular to the longitudinal axis of the wick, the adjustment mechanism including (i) a hollow cylindrical portion that engages the upper portion of the wick, and (ii) a dial portion for rotating the hollow cylindrical portion about an axis of rotation, wherein the hollow cylindrical portion defines an opening through which the wick extends, and the center of the opening is offset relative to the axis of rotation of the hollow cylindrical portion. 45. The evaporator of claim 44, wherein the liquid formulation is one of an insecticide, a fragrance, or an odor eliminator.46. The evaporator of claim 44, wherein the dial portion is formed integrally with the hollow cylindrical portion.47. The evaporator of claim 44, wherein the hollow cylindrical portion is rotatable through a range of rotation of about 75 degrees.48. The evaporator of claim 44, wherein the adjustment mechanism further includes a plurality of tapered lugs disposed on an inner surface of the hollow cylindrical portion in contact with the upper portion of the wick.49. The evaporator of claim 44, wherein the distance between the upper portion of the wick and the heating device can be varied by about 1 mm to about 3.5 mm.50. The evaporator of claim 49, wherein the distance between the upper portion of the wick and the heating device can be varied by about 2 mm.51. The evaporator of claim 44, further comprising a sheath encasing at least part of the upper portion of the wick, wherein hollow cylindrical portion of the adjustment mechanism engages a part of the wick encased by the sheath.52. The evaporator of claim 44, further comprising a fan disposed within the housing.53. The evaporator of claim 44, wherein the electrical plug is rotatable in order to support the evaporator in an upright position in both horizontal and vertical wall outlets.