I'm very happy with xTool products in general and the S1 is an amazing machine. The smoke purifier though is another matter. When it works, it works great but after cutting 3 sheets of wood, It no longer seems to be working correctly and you can see smoke filling the inside of the laser bed.

After I change the filter, the purifier works fine again till after I cut another 3 sheets of wood. I'm also using air assist which is working fine.

I've checked the exaust and there is no blockage so i'm at a loss what to do at this point.