It will be easier to tear if you heat it with a hair dryer. Another way is to use a harder paper knife (utility knife), a flat one, to scrape quickly.
"Self-Adhesive Trademark Removal Method"
For self-adhesive marks on the surface of hard objects, you can apply grease-free nail polish remover on the surface of the object, and then use a soft Wipe gently with a cloth; these traces can also be removed with denatured alcohol or gasoline. If the stickers get on your skin, you can use lemon juice to remove them.
In addition, hand cream can also achieve the effect of removing stickers. Hand cream contains a large amount of water (generally more than 70%), and the water contains a certain amount of surfactants. Surfactants have good wetting, penetrating, and dissolving abilities, and can quickly penetrate between the sticker and the surface of the object to achieve the purpose of removal.
You can find some similar products, such as facial creams, facial cleansers, and detergents that have the same effect.
For stubborn stickers on carpets, the best way is to carefully trim away the traces of stickers on the top of the carpet pile.