Hi. I live in Missouri. Has been around the 0 F for the last week or so. Noticed underneath my sink that is facing the outside wall that there is puddles of water underneath and around the rim of whatever was sitting in there. So my trashbag box was socked half way up it and completely beneath it and everything else that was plastic just had water undereath the object. All the pipes and tubes in the sink looked fine, my water pressure for hot and cold is both fine. Any ideas? Thanks for any hep.

Kitchen or bathroom sink?

Kitchen sink. Just started my humidifer a couple of days ago. Around 50

Could be condensation or a sporatic leak from a dishwasher or garbage disposal. Remove everything and line the floor of the cabinet with toilet paper which will show the slightest drop. Leave the cabinet doors open for a day or two to increase air circulation. What % relative humidity did you set for the humidifier?

So this happened yesterday afternoon when I first noticed it and I removed everything besides a roll of trashbags, dishwasher fluid, and antibacterial wipes. I looked at it again this morning. The three items are fairly close together and there was water beneath each item and around it in a rim pattern but no water between the items. Humidity was 60 yesterday and I thought maybe that would have predisposed to it so I have it turned down to 40 last night. What do you think?

I think you should "Remove everything and line the floor of the cabinet with toilet paper which will show the slightest drop. Leave the cabinet doors open for a day or two to increase air circulation"

So do you think it is condensation? Mainly worried about busted pipes, but I think I would have more findings. Will do what you suggest, just curious what it will help rule up or down