If the plastic basin is not used for a long time, it will produce dirt. Soak the stained part of the plastic basin with hot water first, and then use a brush dipped in some detergent to clean it. Wet the basin with a little water, then put 1 spoon of washing powder in it, and you can clean it. There is also:

method one:
1. Soak the plastic basin in hot water for 5-10 minutes to soften the dirt.
2. Put an egg shell into mash and break it into small pieces.
3. Pour out the water in the plastic basin. Soak the rag, dip it in the broken egg shell and rub it in circles on the inner wall of the plastic basin, and rub it back and forth a few more times. Squeeze a little detergent on the rag and rub it in the basin to remove oil stains. Remember to rinse the plastic tub with clean water.

Method Two:
Add washing powder and water to make a paste on your hands, and then scrub your hands along the wall of the basin for a few times. If the dirt is heavy, you can use a steel ball dipped in washing powder and gently wipe the wall of the basin. Be careful not to use too much force, otherwise the beloved basin will be drawn out.