Debris are a problem for me, so I take a multi-pronged approach to mitigation. But nothing short of full isolation seems a perfect solution. I try and run clean filters on the fans running in the rooms, but I also mop around here daily, so it doesn't build up, sweep less, comb the cat, utilize the purecrop, and I also do a hippy cut style cure, so that I can strip the outter leaves off before consumption, trying to give some level of protection against dust or contaminates in the final stage. It's a real issue, no doubt. Especially for anyone growing in the open.