@PlasticFull @CleanAirStars I was wondering the same thing about improvised (C-R type) devices. On the surface it would seem easy to wrap or cover with a cloth or solid screen dust catcher which could easily be vacuumed or washed. Never got a good recommendation on specific material.
@PlasticFull@CleanAirStars我对简易（C-R型）设备也有同样的想法。表面上，似乎很容易用布或实心滤网除尘器包裹或覆盖，这些除尘器很容易被吸尘或清洗。从未得到关于特定材料的好建议。