 That seems a little funny. What? Funny? Like a clown? Do I amuse you? You have no idea what you're doing. Check out the warnings on this can. They can blow you to bits. It's under pressure. You know how many people have joined me after trying to do it themselves? So what do I do? Well, get over to Perfection Auto Works for the $49.95 AC tune-up. I gotta go. Some guy's on a bridge.