I tried a lot of chemicals and they all turn the aluminum black especially when the temperature rises too high. I ended up using a tile cleaner called Easy Clean from a company called TFC. Just don't let the temperature go above 40 degrees Celsius. www.builders.co.za/Home-and-Decor/Home-Cleaning-%26-Accessories/Multipurpose-Cleaning/TFC-Easy-Clean-EC05-(5L)/p/000000000000019319?gclid=CjwKCAjwrranBhAEEiwAzbhNtX6idwEzAoPkI4QJ9AN1i-GYWjFyXuaMQ3Cb1YSuWpf_Zccgb9a0LBoClukQAvD_BwE
What solution did you use in the ultra sonic cleaner?
I tried a lot of chemicals and they all turn the aluminum black especially when the temperature rises too high. I ended up using a tile cleaner called Easy Clean from a company called TFC.
Just don't let the temperature go above 40 degrees Celsius.
www.builders.co.za/Home-and-Decor/Home-Cleaning-%26-Accessories/Multipurpose-Cleaning/TFC-Easy-Clean-EC05-(5L)/p/000000000000019319?gclid=CjwKCAjwrranBhAEEiwAzbhNtX6idwEzAoPkI4QJ9AN1i-GYWjFyXuaMQ3Cb1YSuWpf_Zccgb9a0LBoClukQAvD_BwE