[Lifiting] Is in-mode also resistant?

I have a particularly heavy double chin, so I get Inmode regularly, but it seems to be getting less effective. It wasn't just one place, I got recommendations here and there and went to places that sold handmade products and had good reviews, but the results are always puzzling. I recently got it twice in a month, and the swelling and pain has been going on for 3 weeks.. Is there such a thing as tolerance to in-mode ? ? It's not because all the fat cells have already been destroyed, but the jowls are still thick...