I Wiped My Bedroom Windows Dry Every Morning for Two Weeks Before I Figured Out What Was Actually Wrong

The Humidity Test

I needed to know if I was dealing with normal bedroom moisture or something else entirely.

So I drove to Home Depot and grabbed a little digital hygrometer off the shelf—$12, about the size of a deck of cards. It measures humidity as a percentage, and I had no idea what number to expect.

I set it on my nightstand before bed.

The next morning, it read 68%.

I carried it into the living room: 44%. Kitchen: 46%. Bathroom, even after my shower: 51%.

Back in the bedroom: still 68%.

That explained the condensation perfectly. When humid air hits cold window glass, the moisture has nowhere to go but down. The more humid the room, the more water ends up pooling on the sill.

But here’s what I still didn’t understand: why was my bedroom holding twenty points more humidity than the rest of the house?

Something in that room was actively adding moisture to the air every single night. And once I started looking, I found not one source, but three.