When the colloid has cured, you can first use a hairdryer or heat gun (with a temperature above 140°F, suitable for heat-resistant surfaces) to heat the colloid for 2-3 minutes, scraping it off with a plastic scraper while heating, or apply a cloth soaked in 75% medical alcohol for 10 minutes to soften it and then peel it off.

For heavy items like mirrors and large shelves, you can lightly tap the edges with a rubber mallet to vibrate and damage the adhesive layer, or use fine steel wire to saw through the adhesive layer from the back and pry it off. If necessary, use a hammer and pry bar for gentle mechanical removal to avoid damaging the drywall.

When removing residual adhesive stains, soak a small area with white vinegar or lemon juice to soften it before scraping it off.

For stubborn residues, apply mineral oil or petroleum jelly and let it sit for a few hours.

Be cautious when using turpentine or oil balm on wood or plastic surfaces; apply and let it sit for 5-10 minutes before removing.

When operating, it is necessary to do so in a well-ventilated area, wearing safety goggles and gloves to avoid solvent irritation to the skin.