I'm picking up my first shipment from Mada Medical in just a few minutes. I'll be stocking Madacide-1 and Madacide FD in gallons. At Hill Street Tattoo, we've typically used the Fast Drying version with alcohol. When I was an apprentice at All or Nothing Tattoo back in 2010, we usually ordered Madacide-1 alcohol free. Since we typically wipe everything down after letting it sit long enough to sanitize at tattoo shops, I think they're equally user friendly. Take your pick. Save on shipping. Have your hard surface disinfectant delivered for free locally.