What do you weigh in?

Underwear. Maybe naked if I didn't wear underwear to bed the night before.

But I follow the same routine every morning. I wake up, pull my scale away from the wall to the level area of the floor and click it on. Then I go the bathroom. After, I take off my PJs, turn the scale back on, and step on to get my weight.

And I do that within the same 15 minute window every morning. I record all of the daily weights in a spreadsheet where I also track calories and macros. Then I log my Saturday weight every two weeks.

I do the scale "reset" because you really shouldn't move your scale around since it can throw off the mechanisms inside. But I can't keep it in the middle of the bathroom floor all the time and when it's anywhere along the wall, it's wobbly. So the "reset" is just basically a way of having it feel it's own weight while on and on the level area of the floor. If you can keep your scale in one place, just do that and don't move it each day.

Oh, and I only step on the scale once. But I test it's accuracy over time by stepping on and off my scale about four times every three months or so, just to test it. As long as I always get the same weight, it's fine. When it starts giving different weights (only happened once so far) I changed the battery and that stopped.