Thanks for the question. There wasn't much build up, just a film. I used soap and hot water, no chemicals. It's a stainless tank so it was easy to clean, getting to the inside of the tank is the difficult part. Thanks for watching!

It wasn't hard to get mine off. Maybe missed a screw somewhere? You might try filling it with a mixture of white vinegar and water and let it set awhile. It may be glued on with hard water deposits.

Hi, Thanks for the comment. There was a gasket on top of the boiler. It was clear silicone and I just cleaned and used the original as it was still pliable and not torn. Form-a-gasket is a terrible idea! I used Hot water, a steel wool pad and elbow grease to clean it. No chemicals of any kind. I was worried it would leach into the water eventually. There are food-grade de-scalers available, and white vinegar, lemon juice etc., but a little scrubbing and scalding hot water was sufficient in this case. I would re-use the gasket if it is in good shape. If not I would purchase the proper replacement parts. Your coffee maker may look the same but you have to be careful. I watched another repair video on a coffee maker similar to mine but the tank was not serviceable. It was a sealed tank, no boiler lid to remove. It cost me $18 to repair mine with the purchase of the switch and the water lid, but replacing the boiler tank would have cost quite a bit more I think. One thing I did learn with these coffee makers is that if it is plugged in, it is heating water. There is no on-off switch for the boiler heating element. After your cleaning/repair, I would suggest unplugging it or connecting it to a wall switch so the boiler elements can be turned off when not in use. Longer life and less scale build-up over time. Good luck with your project! Thanks again for the comment and thanks for watching! Cheers.

Filter the water. Run de-scaler through it once a month or more. Thanks for the comment and thanks for watching!

Hello, how can i run the de-scaler after pouring it with water my unit is bunn vpr-b. Almost the same as yours this has just a diff tank design, mine is round. thank you.

No clue

VPR (voltage protection rating). It's a safety thing whenever you combine a publicly used electrical device with water (coffee maker). It ensures that if there is a short, the unit will cut the electricity so the user won't get electrocuted. Thanks for the question and thanks for watching!

I know what a VP is, but not sure on the R.