Drew, will any of that harm the plants if it gets on them? The spiders are mostly hanging out under the lip of the pots, right where your fingers go when you grab a pot. I can certainly use it on the floor and around the outside of the greenhouse
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nevermind, I see where you said not sure about the plants. I missed it the first time. Okay, that gives me something to try. Even if it doesn't get all of them, perhaps it will discourage more from coming in.