Bat guano clean-up should be left to professionals, if not we highly recommend taking every safety precaution possible. This is not a scare tactic – but what I do want to do is to emphasize the importance of what you do with household items that have come in contact with bat guano…. throw it away! Meaning if you have swept up guano with a broom, either mark it to where it will NEVER be brought indoors, or dispose of it. Do not allow the items that have touched guano to become a part of your laundry or used again inside.
There are several diseases & parasites which can be spread through improper exposure or removal of bat guano. We use required filtration and industrial-strength disinfectant to clean-up after bat guano has been removed. Guano clean-up is not always necessary it simply depends on the location of it and amount. Not only is guano a health concern (if exposed) but it is also extremely destructive to the integrity of wood let alone anything else it comes in contact with. So when there is a lot of it - we recommend removal.