Welcome Elmonty, congratulations on your purchase you will love it, I have two bowls and one of them is tight to close I usually have to give it a hard push sometimes two or three times just one of those things the other is really easy, I just get my dish washing cloth, not a sponge, hold it taught with both hands about 10cm or three inches apart and feed it into the groove and move it back and forth it's not a big deal and easy. Enjoy your machine.