i use a red scotch brite pad and dish wash detergent i guarantee you will remove everything. then i finish it up with some wax and grease remover and dry it off with a white scotch brite pad.
1/4 Pinesol + 2/4 Kitchen Floor degreaser + 1/4 warm water. in a bucket
I use just any old cloth/towel/t shirt
on my rims i use the blue SOS pads and a tiny bit of oven cleaner.
its cheap and it get every bit of the dirt/road grime off.
then I use regular car wax on the entire car.
on the front and rear bumpers i apply wd40 and wipe in with a rag. ( it keeps bugs and other stuff from sticking to the bumper)
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