I have a Vulcan rda that I've purchased almost 2 years ago..stopped using it because i got a plume veil about a year ago and loved it..yesterday i decided to pick up the Vulcan and try it out again..put a fresh build on it and mmmmm the flavor and vapor production was amazing but after about 2 refill my top cap very loose..I went to the store picked up some new orings and didn't help..anybody have an idea what I can do to get my top cap to be snug??