Hi. I am a newbie to laser cutting. We have a Trotec speedy 360 Flexx. I am cutting some simple wooden shapes from 3mm bamboo sheets. These are leaving a dirty residue on the aluminium grid table, meaning the backs of the cut shapes have dirty marks on each time.

I have tried raising the wooden sheets up by 3mm using some offcuts which does improve things a little, butwhen the pieces drop down they are still getting marks on them from the bed.

Has anyone else experienced this, and is there a solution?

Thank you.