What is this under my sink?
I have some
I have some brown dust under my sink in my laundry room. I noticed my paper bags were very brittle being stored there, they seemed to crumble when I tried to use them. Then tonight I took a flashlight and saw that the pipes had some green tarnish on them and some brown growth that was eating away at the steel wrap around them. Please let me know what this is so I can get rid of it. Thanks!
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