It's generally not recommended to wash a cup with a label sticker on the inside in a dishwasher. The high heat and intense water pressure in a dishwasher can cause the sticker to loosen, curl, or even come off completely. Additionally, the adhesive used in stickers may not be dishwasher-safe, and it could break down or dissolve during the wash cycle, potentially leaving sticky residue on your dishes or inside the dishwasher.
To prevent any damage to the sticker and ensure the longevity of your cup, it's best to hand wash it. Here's a safe method to clean a cup with a label sticker on the inside:
- Fill a sink or basin with warm, soapy water.
- Submerge the cup in the water and let it soak for a few minutes to loosen any debris.
- Gently scrub the inside of the cup with a soft sponge or dishcloth to remove any stains or residues.
- Rinse the cup thoroughly with clean water to remove all soap and debris.
- If there are any stubborn stains, you can use a mixture of baking soda and water to create a gentle scrub.
By following these steps, you can clean your cup effectively without damaging the label sticker. Always check the care instructions provided with the cup or the label sticker for any specific cleaning recommendations. If you're uncertain about the sticker's safety in the dishwasher, it's better to err on the side of caution and hand wash the cup.