+1 on Microphome.
This stuff is fantastic. One squirt of foam in the palm, rub it on the grille, let it evaporate (a couple minutes) and you're done. Sterilized, deodorized, no residue. Way better than wipes IMHO - no waste. You get over 100 cleanings from a small bottle, costs about $10 IIRC via Amazon, Full Compass, etc.
Highly recommended. Every tour, every club, every church should carry this stuff. Studio cats, too -- because it's a foam, the solvent sticks to the grille and won't harm internal electronics. And talent LOVES it when you come out and sterilize their mic before a session.