How to clear the theophylline on the cup
1, scrub with toothpaste, can be washed clean. 2, with a small brush or steel wire twisted into a round brush wash.
With vinegar soak, then wash it. If you feel a little vinegar, can after cleaning, soak a cup of tea water or lemonade.
Light use dishwashing sponges can erase. Heavier, dip in with towel toothpaste can erase easily
Where there is theophylline coated with toothpaste, a cloth to wipe a few times, rinse clean.
