Hello.
I would suggest removing the sponge on the stubbornness. From my point of view, it's a useless block, because when placed on the surface it just evaporates. And we still spend a lot of keys on her.
See the image
https://drive.google.com/file/d/1HAyusH_sQMYlSolKni6jJ1_FRY7iuO2H/view?usp=drivesdk