Yes, it should be possible.
Just fill your kitchen sink or bathtub (if you got one) with water, put the mousepad in and some dish soap, grab a sponge & rub your mousepad, then take it out after you cleaned it & pat the mousepad dry :)
Don’t be a dummy and clean it with a dryer or in a sink like these people it’ll make your mouse pad lose its feel. You want to clean with with a wet micro fiber cloth . After you wet it you squish it so all the water isn’t too much for the mouse pad. Then swipe up and down on your mousepad. With that let It dry for atleast 24hours don’t use it or it’ll feel weird if it’s not been 24 hours