The door of the toilet in the rental room is too low, is there any way to remind yourself to avoid h

You can glue or nail a cloth about 15-20cm high and as wide as the door on the door frame, so that if you consciously think that it is the door frame, you will bow your head and not touch it, even if you accidentally touch it, it will be fine, it will not hurt

Put a banknote under the toilet door, preferably 100, so that when you go you will pick it up and bend over it,, haha,

Hang sticky hooks on both sides of the wall 15 cm away from the door frame, pull a rubber rope, and the height is 5 cm lower than the door frame.

Get a brightly colored sponge on it to remind you that even if you forget to hit it, it can reduce the pain.

Place a sticker in front of the door with a bright color to remind yourself in time.

Put a big note on the door with caution written on it, and that's fine.

Wrap it in a sponge, and it won't hurt even if you hit it.

Write two words on the ground at the door, bow your head!

Brainless. I thought about it after hitting it twice.