I use a long handled flat dust mop looking thing, and spray it with Greenshield, every surface gets touched. You will destroy pathogens and will remove dust, algae, anything that can contaminate a crop. Scrubbing out the GH every year is a must for me. I also put away the brooms for sweeping, every surface that is solid gets a shop vac put on it so the particles are sucked away, not spread through the air.
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