Ok, I have one of these infurnal things. Its one of the pressurized vessel ones where the sand is stored in a heavy metal pot that is filled with compressed air. I think its a 10 pounder or so, I got it from northern tool. Anyway, my compressor is not adequit for it, so I can only blast for a few seconds at a time before I run out of usable pressure. The damn thing keep clogging up with sand and it pissed me off enough that I used a grinder and flap disk instead of the blaster to clean a 24" diameter barbeque pit. I dont know if I am allowing too much sand into the hose, or if my sand might have abosorbed some moisture, as it has been sitting for about a year. So basically, what is the right way to use this bastard?