The bottom of the Instant Pot can get sticky with all the cheese in this recipe. I would suggest you take out any leftover pasta right away and refrigerate. Then simply add a cup of hot water, a teaspoon of baking soda, and a teaspoon of dishwashing soap to the Instant Pot, steam for 2 minutes. Dump out all the liquids and then clean the pot with a dishwasher sponge and soap.