I'm trying to keep my 2012 Hot Spot Relay in good condition and so far it has looked and ran great, but in the last week it has started to foam horribly but ONLY when i allow air flow into my jets. When they have no air flow through them the tub looks amazing. Any ideas? I thought maybe it could be a problem with having to much antifoam in the tub and maybe it just started collecting a film on top but their is no sign of any film on top. I know most people would say drain with a spa problem like that but draining is a huge hassle in my location. Any ideas would be greatly appreciated.