If there is only glue left on it, you can first heat the bottom of the tray, then clean it with a large piece of transparent tape, and tear it with the adhesive side close to the bottom of the tray for many times to remove it.

Extended data:

Tips for removing adhesive residue:

Blow hot air on the sticker with a hair dryer, so that the sticker can be easily torn off after heating. (Try not to use it in digital products. )

Cream. When coated on the sticker, it can quickly penetrate between the article and the non-adhesive, and then wipe it to easily remove the stain. This cream can be stored for a long time and is very practical.

Put a little balm on it and wait for two minutes. It can be easily torn off by hand.

You can tear off a layer of paper on the sticker, then coat it with alcohol or gasoline, then wipe it back and forth by hand, and finally wipe it clean with a cloth.

Nail polish and hand cream, painted on stickers, can dilute and dissolve those that are not sticky.

Brush it off with a steel ball dipped in water, but it is not recommended to use it on precious metal items, otherwise it will leave scratches.