[MtF] Non-perscription numbing cream for electrolysis? Anyone?

Some months ago I saw someone mention some sort of non-perscription numbing cream you could get for electrolysis? Anyone know what it's called or where I can order some online (reliably)?

Thanks :-D

PS. Uh, also any other 'pain reducing' ideas would be helpful. I've heard some people say something about making sure you're well hydrated, also something about caffine?