I live thousands of miles away, but I've been using Dvarw atomizers since 2019. I'm not sure what issues you're encountering, but generally, they require only a few adjustments. The design between the MTL and DL models doesn't vary much: for both, what's crucial is to completely cover the cotton wicking slots, otherwise, it will flood.
Remember to properly lubricate the O-rings of the movable chamber and always make sure to insert the final cap. If you're using second-hand Dvarw atomizers, I'd recommend replacing all the O-rings. If they don't seal properly, you'll run into flooding and the draw won't be silent.