Avoiding stuck reed

Hello friends,

I'm sure this is nitro engines 101 and bread and butter for most of you, but I haven't been able to find a definitive solution for this problem I'm facing.

Each time I buy a used reedie, or try to start one that has been sitting for a few weeks, the engine will only run on prime for a second or so, but will not draw any fuel from the tank. I'm fairly sure that the issue is that the reed gets gummed up with oil, as disassembling the engine cleaning the reed valve resolves the issue every time. Problem is, removing the engine from the model to take it apart and clean it is a major pain, and I find myself having to do it more often than not.

Is there any after-run engine care procedure that would help me avoid this? I am draining the tank, of course after run, burning off any fuel left over in the fuel line, and I wipe the outside of engine with a paper towel. I use a commercially available nitro fuel with 10% oil, which is, according to the manufacturer "a mixture of synthetic and castor oil" (proportions not given), plus I add enough castor to make it 20% oil overall.