A compactor wheel tip for a landfill or soil compactor comprises a bottom wall having a wheel engaging surface, a top wall having a ground engaging surface, oppositely disposed front and rear walls having concave surfaces, and oppositely disposed side walls. The emulsion is desirably in the form of a meta stable emulsion and is characterized by the use of a surfactant comprising a combination of a primary and secondary surfactant where the primary surfactant permits formation of the emulsion and the secondary surfactant permits autoclaving of the surfactant. Surface tension pulls the first and second waveguides into alignment. The texture data is compared to reference information in a database. Other embodiments may be described and claimed. The cleaning element has side edges with elastic to draw the ends of the side edges of the body inward to form an opening smaller than the outer diameter of the paddle to releasably attach the cleaning element about the paddle.