Muffler Tips- Gotta be that- not because it is a pita but because I forget...then windows, then sideskirts...if you keep up with it doorjambs are a breeze...I could see how they might be bad up north in the winter though. As far as carpets- Bought a little green machine and armour all multipurpose cleaner (in the blue bottle) works wonders on carpet and the plastic panels in the car. Borrowed some oxi clean once, glad I didn't buy it. Don't get me wrong, It is a halfway decent cleaner, not a good stain remover though.