The method consists of placing some paper towels, a little liquid dish detergent and warm water in the plastic container.

Then close the container and shake it well. Then take a few pieces of paper towels and tear them into smaller pieces, then shake again. This operation will allow the paper to absorb the water.

After about a minute, remove all the paper towels from inside the container and pour the liquid down the drain. Rinse the plastic container well and it will be as good as new and will no longer have those annoying orange stains.