I have used this one and works pretty good:
Simple Green 19128 Crystal Industrial Cleaner/Degreaser, 1 Gallon Bottle https://www.amazon.com/dp/B000ULLGRU/ref=cm_sw_r_cp_api_i_.zLaDbJVPHPJF
I bought this to clean my oven. Decided to try it on my cassette and worked really well:
Citra Clean/1 gallon https://www.amazon.com/dp/B0127ZAQRC/ref=cm_sw_r_cp_api_i_RCLaDbADRRM61