It's a problem everyone who does laundry knows all too well: The shirt hem that flips up and stays up, seemingly forever. You spend 90 percent of your day tugging away at the bottom of your shirt in an attempt at staying kempt, whatever that means. Maybe you make an attempt to iron it with your dress clothes—a lot of work for a basic tee. But then, the shirt hem is like a stubborn curl: one go through the wash and it's back to its old ways.
Good news: There's a fix! Two actually.
Method 1: The Half-Dry
You need to only machine dry your shirts part of the way through, and air dry the rest of the way with the hem—shirt bottom or sleeve—properly flipped down.
I couldn't find any definitive reason why the hem flip happens—in some cases, it can be ascribed to a lesser-quality shirt stitched off-grain, but that's not the case for every shirt—but most sources blamed the heat of the machine drying process, in one way or another. The consensus, in many cases, was this: However your shirt cools is how it's going to lay. If you remove your shirt from the dryer part-way through—while it's warm, but not totally dry—and lay it flat with the hem flattened out, it'll stay that way as it cools down.
Method 2: Use a Hair Straightener
Ironing is a solid way to get that hem to lay exactly how you want it, but breaking out the clothes iron and ironing board is a lot, especially for one tiny shirt hem. So if you're getting ready one morning and find that your shirt is doing its usual, annoying, flip-flopping thing, just reach for your hair straightener.
Make sure the straightener is clean and dry, then clamp it around your flattened shirt hem to tame it into position. While you're at it, you can use this trick on any stubborn shirt collar, sleeve or a wrinkled button placket, too.