I am in the same boat. I’ve bought a few of their tools and they are great for my purposes. I have a miter saw and a table saw of theirs. Both are probably junk compared to more expensive tools, but I use them 2-4 times a year. It doesn’t make sense for me to get the more expensive stuff.
That said, if I start doing more I’ll probably ditch them in a heart beat. 😆
I feel like this is the answer. The amount of work to clean the screening will probably be about the same amount of effort to just replace it. Some local hardware stores will even do it for you (not the Home Despot)
Even if the OP manages to clean it the screen will probably be brittle and may break.