Cardboard creations

Did you guys sanitize the cardboard first? I do have a lot cardboads, however im not sure it is clean.
 
I’m not sure you could sanitise cardboard really, I never have, just make sure it looks clean & doesn’t have any kind of dirt or anything on it & it should be fine, make sure to remove any tape that might be on it though.
 
I leave toilet roll inners for a few days before using them :) I don't think bugs can survive on cardboard more than a few days.
 
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