I copied this directly from the FAQ's on JPW web site.
My Pad has soaked up a bunch of water. What can I do to fix it?
When a pad is full of water, it will not work very well. Try to avoid floating on a pad that has holes, a bad, or open valve. The easiest way to get the water out is to hang the pad upside down with the valve down for about 2 weeks. Every day you must take a minute to try and squeeze the water out through the valve. When you can not get any more water out, place the pad in a warm area. Place it on the the south side of the house, where the sun can heat up the remaining water, and turn it into vapor. Then suck the air out with a shop vacuum. If you do this for a couple of days when the pad is at its hottest, you will be able to get all of the water out. This does not take as long as you may think, just a couple of minutes a day.
One other way is to cut the bottom of the pad off, dry out the foam, and reseal the end. If you prefer this method, call us, and we will fax you instructions and a drawing of how to put the cover back together with our glue.