never spray any lubricant (especially wd40) into any component of your mixer. if you are looking for something to fix bleeding or simply give better contacts on electrics, use this -> d-5 and this -> pro gold
radio shack contact spray is fine on cheap mixer, but in the long run may be bad for it(kept it going for a year and a half, not bad for a disposible mixer).........Caig (made by cal aswell) is supposed to be good if you care about your mixer