Take out the straw off the lid and attach it to the valve by twisting.
Shake the can vigorously.
Moistening application surfaces would accelerate the drying speed and would have a positive effect on cell structure, efficiency, and adhesion strength.
While the can is upside down, press the trigger for the foam to come out.
Since the foam would expand, partially fill the gaps where you would apply.
From time to time, shake the can again during the application.
Leave the straw on the can for the next application; otherwise, clean the valve with a solvent like acetone.