If it takes 1 to 2 minutes to build up enough pressure so you can't hold it back with your finger you are not losing much air. I hate air leaks but remember that the valves are there with the purpose of causing an air leak. Do you really need 10 seconds of open time to get rid of the moisture? I bump mine open for an extremely short time with the time and interval based on the current humidity and temperature (computer controlled). Since I started doing that my filter shows no moisture color change on the indicator.
Brian
Brian