Originally Posted by lhowemt
don't take the valve off. Try turning your pump backwards (deflate instead of inflate) and suck it out that way. Then, fill up with air, hot sun, release. Repeat, repeat, and repeat.
I'm not a rafter, but it seems that you'd be doing a lot of good if you could establish consistent air flow through the wet tube. Is it possible to put a long hose into the tube, and hook it up to a compressor, let it run for a few hours?
Another alternative: could you put alcohol in the tube to speed evaporation (not sure if this would work, is a good idea, or a prudent use of alcohol).