I just got a new GS Air M the other day myself and my flavor is off on my NETs too, both with the cotton 1.2 and changed it out for a 1.5 dual and same thing, inhales is ok but an off taste in my mouth after the exhale. I've cleaned it twice in dishwashing liquid and rinsed thinking new tank residue, I don't have any drinking alchohol or I would try that beer or wine wont work haha. I didn't have a problem cleaning my other new GS-tank or GS air and the coils really don't have much break in time like my naughty mini coils require.I use NET and it is rather mild in flavor, certainly not a flavor to overpower, but I get a "sock in the mouth" taste. Even a new Nauty BVC has an off flavor but settles in after a few hits. This cotton wick stuff appears to have this trait. I will give it awhile to see if it too settles in.![]()