I have found that the Vivosun also clogs with the gunk in the smoke
I was wondering about that. Makes sense that you’d want to periodically clean it, just like the GF fan. I was thinking about designing a gasket to go on the outside made out of TPU as well, but I’m not sure if it would seal up tight enough. I like the foam tape idea. I have some of that laying around and may try it. Something else I might do is just buy an extra Vivosun fan so I can easily swap them out, and then clean when needed.