Question about washing old towels/mitts

[Based]

I have microfiber towels and mitts that I used a couple months ago that i still haven't washed. Would it be ok to use them still if I wash them? Some have wax/polish residue on them and probably one or two towels have either brake dust or carbon from muffler tips.

Idk if I should just throw them out or if it's safe to wash them and use them on my new car.

 

[MS67]

You can wash them. Put some all purpose cleaner or degreaser in the wash and it'll help break up the old wax residue. Add in 1/2 cup of white vinegar to the rinse cycle to restore softness. Tumble or hang dry, don't use any fabric softeners.