Anoushka,

My cat Maya Linn has kitty acne. I wash it with an exfoliating glove soaked in a medicated cat shampoo. Then I put 10% Benzoil Peroxide on it (at the advice of my vet). Maya Linn doesn't seem to mind it and it does help clear it up. All their dishes are stainless steel once I learned that plastic harbors bacteria.

Good luck with your kitty!