There are many great tips online for cleaning foam pads, but 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, we don’t really recommend doing this. I would suggest to simply use some soap and hot water to hand rinse them, squeeze all the moisture out, then leave out to air dry, then placing them in the plastic bag to re-use the next time.
- Make sure it's 100% dry before using it again. Water in the pad will definitely have a negative impact.
- Make sure you don't use any other products on the pad. Don't mix other products onto the pad.