best product to clean grease?

ill be re upholstering most of my interior, and also replacing seats, taking out bench seats and installing subs in the trunk,
what is the best all around cleaning product for all the grease and shizz, especially say the spare tire bay and the carpet that goes over it

Green Stuff.
you can get it at any store.
It is actually called "green stuff".
or you can try some other heavy duty cleaners.

Simple green works real well also.

thx guys

Castrol super clean gets rid of the heavy crud (and your skin if your not carfull) but I stongly recomend SIMPLE GREEN AUTOMOTIVE.It comes in a black bottle the stuff is great!!

greased lightning buy it at auto zone