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There is no need to find a property, it is a foaming agent, which is used to plug the gap between the air conditioning hole and the pipe, which is harmless to the body, not your family, almost all the air conditioners will be installed, if not, it means that the company that installs the air conditioner is not professional or irresponsible.
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It could have come from a locust or a mantis' nest.
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It is used to block the hole of the air conditioner when installing the air conditioner and prevent dust and insects from entering and exiting.
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It must be a material used to block the air inlet and outlet holes on the wall when you installed the air conditioner, what kind of mud thing is called, I know it as soon as you say it, it's okay, it is estimated that you didn't find it at the beginning, no, you scrape a small piece down to know, there is no smell.
That's the nest of bugs.
I didn't send a picture, I don't know what it looks like. >>>More
Check the sewers in your home for blockage, and then check for mold in the damp areas of your home and the woody areas.
It's a crow, congratulations to you The crow has taken a fancy to your family and doesn't look like a bad person, so it's a nest on your balcony, I hope you don't interfere with it and let it multiply.
Eggs, there are moths on the balcony, so there will be.
This shape should be the eggs of the edge bug. Hemiptera. >>>More