that's interesting. First time I hear about shaving foam...
It's not a rocket science. As it was said, 99 times of 100 a couple of water drops on a sponge does the job. Then not, buy some cleaner. There are lots of them. I use Donic spay. It lasts for ages.
View attachment 18175
but I'm sure any cleaner will be good enough. Also buy a sponge. There are 2 types of them:
View attachment 18176
View attachment 18177
the former is dense foam sponge. It's small and I carry it in my racket case if I need to wipe my rubbers in the club. Latter is a chamois sponge. Bulky, so it stays at home and I use it if the rubbers get really dirty (for example If you played in some dusty environment or smth..).