BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be better understood from the following detailed description of a preferred embodiment of the invention, taken in conjunction with the accompanying drawings, in which like reference numerals refer to like parts, and in which: FIG. 1 illustrates the air filter cleaning device according to an exemplary embodiment of the invention in use within a typical air filter; FIG. 2 is an enlarged side elevation view of the device, partially cut away; FIG. 3 is a sectional view taken on line 3-3 of FIG. 2; and FIG. 4 is an enlarged sectional view taken on line 4-4 of FIG. 2.