I second that. It (WD40) doesn't only discolour plastic parts but the PAINT of the car as well in the long run!I'd be careful applying it to any plastic pieces, as it can be pretty abrasive stuff...if the part is in clear view you might end up with discoloration... my 2 cents
Do not use either method and definitely do not "fix" squeaks by cranking down on interior screws; insert some felt between the squeaking surfaces, then tighten the screws back down until just snug. The squeaks will be permanently eliminated.Has anyone tried to use WD40 instead of electrical tape to fix rattles/creaks/squeaks? WD40 just seems so much easier to apply than electrical tape...although it does have the smell that takes time to go away.