This may sound extremly stupid, but I need to know. I was taught and have been for a long time cleaning my air filters using my mixed gas, then after a good dry time I oil it up and get going. This has always worked just fine for me but a friend told me that it is terriable for both the filter and the bike. I can see that using gas might make the foam deteriorate faster but I was told from now on to use dish soap and hot water. What is everybody's opinion on this???