I put 30 psi in my rear shocks. The next day, they are down to 20 psi, never any lower. I've checked all of my fittings and everything looks fine. Any idea why I would only lose 10 psi?
I have heard of folks removing the black air tube and cutting off some of the end and putting it back into the fitting?? It is a push pull type fitting for easy removal, good luck.
Sounds like 20lbs is the threshold for where ever the leak is. Mainshaft's suggestion would be a good place to start. Maybe some soapy water on the connections will give you bubble at the leak.