|AR15 Bolt top, 22 LR adapter bolt bottom.|
So here comes the advice, I will say I have not put this to the test yet however I just discovered the problem in the last few days and I think it will work. If you shoot using one of these adapters after each range session remove the bolt and with a can of solvent (carburetor cleaner works good) and with the aid of those little plastic tubes the solvent comes with shoot a quick burst through the gas tube and watch to see if it blows out in the barrel. After the solvent dries install the AR15 bolt and fire one or two rounds of 5.56 ammo to ensure it is operating and 'blow out' any remaining crud in the tube and port. This would ensure the gas system was functional and let you know if it needed more cleaning.
This is my solution, maybe someone else has other ideas.