Cookie, bread dough on any brush can be a real problem. I soak the bowl in COLD water for a few mins., put my hand in (or you could use a wooden spoon), and turn the blades back and forth to loosen dough under the blades. You can sit it back on base and zap on Turbo a couple of times. Hot water sets the dough on the brush. Once set, even a commercial dish washer wont remove it. I use a blue handled bottle brush for most cleaning , from Woolworths, $5. I have been through 3 of these in 18 months. Hope this helps.