We use a Mr. Clean magic eraser. DD has three bats. 2 about 1 yr old and a new Easten stealth and we clean once per week and they all look like new!!
Soft Scrub, been using it for years. If you have build up. It saves some arm muscle if you use the dish sponge with the plastic backing that doesn't scratch . Otherwise we just spray it on , let it set and wipe off with the sponge.