How to Stop Itching from Mosquito Bites with a Simple Spoon Trick Step 1: Heat a Spoon Run a spoon under hot tap water for a few seconds until its warm. Step 2: Apply to the Bite Carefully press the heated spoon onto the mosquito bite for a few seconds. Why it Works: The heat will destroy the protein in the mosquito saliva that causes the allergic reaction and the itching sensation. Tip: Be careful not to make the spoon too hot; it should be warm enough to feel soothing, but not so hot that it burns the skin. Now you can enjoy relief from itching without reaching for creams or sprays!