Hi, I can't seem to get the air hose off my air valve - I guess it was screwed on too tight, so now when I try to take off the hose the air valve just unscrews from the rest of the AB. So I end up with the air value on the end of the air hose, but I can't get a good enough grip on the air valve to unscrew it. I don't want to use pliers as they might ruin the threads or the finish on the air valve. There's a sort of groove down the threads of the air valve that should provide some purchase if I could make use of it. Doesn't seem like a great design to be honest, as this is always going to happen if the air hose gets screwed on tighter than the air valve is. Any suggestions?