"Products made of silicone are nonporous, which means they do not absorb bacteria like jelly toys. Use a sex-toy cleaner or gentle antibacterial soap and water to clean. Silicone sex toys that are not battery operated or do not contain an electrical system can be boil for about two minutes. Let air dry or wipe with soft cloth."
I'm sure you could use a tooth brush for cleaning all the crevices too.