Try a camera dust blower like this;My only serious issue with them is the corrosion that occurs in the charging ports wit regular use (at least in salt water). I have to frequently use vinegar and/or fine steel wool to remove the corrosion so they charge fully after use.
It gets the water out of the contacts before you plug in the charger. I had the same problem with my first Sola, but haven't had any issues since I began blowing the water out first.