to all you poor seaclone owners, like myself, here is an interesting and simple mod. i put a wide rubber band around the neck of the collection cup, and lubed it with veg. oil. it makes a nice tight seal, and so far, mine has increased double or more in production! i've tried all the others, like cutting down the inner tube, and changing the air valve, and they help. but this simple mod really seems to have made this thing work! just re-lube the gasket each time you clean the cup...it seems to help.