[mirwa]

Most laser machines are fitted with an extraction fan, just make sure it’s vented outside the area your working, much to my dismay I can say i have breathed plenty of pvc laser fumes, I know they are bad, but it happens. My machine vents to the roof

Do a test cut on any new material, I typically cut a small circle in the corner, then I can see if it melts or warps

After cutting get a clean dry cloth and wipe the laser nozzle, when you cut lots of jobs it builds a film up on the nozzle

Steve