Don’t throw away old toothbrushes. Tying two together can solve many problems

Cleaning the keyboard
Computer keyboards are prone to dust after a period of use. You just need to use an old toothbrush to brush the keyboard, the dust will be easily blown away.

Cleaning a comb
A hairbrush is an everyday item that can easily get dirty due to sweat, dirt, and dandruff. To clean a comb, you can use an old toothbrush, dip it in a little water mixed with detergent, and brush along the teeth of the comb. The stains will be quickly removed.

Cleaning the d3ad corners of the toilet