There are many great tips online for cleaning foam pads and microfiber towels, and it usually involves throwing them in the washing machine with your other soiled microfiber towels.
If you don't have a bunch of other things to clean, since it's just one pad, and one towel, my only suggestion to simply use some soap and hot water to hand rinse them and leave out to air dry, then placing the pad in the plastic bag to re-use the next time and leaving the towel out to hang dry.
Couple more important tips are to make sure you don't use any other products on this pad, besides our Liquid Wax, and make sure it's 100% dry before using it again. Water in the pad will definitely have a negative impact when using our Liquid Wax.