You need to have a much better filter than 0.3um as has been pointed out by others. I simply didn't like the smell of the ABS (PLA is fine) so I put mine in a

You need to have a much better filter than 0.3um as has been pointed out by others. I simply didn't like the smell of the ABS (PLA is fine) so I put mine in a laminar flow cabinet originally configured for down flow to keep silicon wafers clean in fab transport. I reversed the filtering system so it pulls the fumes from the printer through the filter which is good to 0.1um. Of course it's a bit silly because the cabinet and filter was originally 10x the price of my MakerBot ToM but I picked it up for cheap at a local electronics surplus store. Here's a picture: http://7t.io/printer.jpg http://7t.io/printer.jpg