It is great stuff! I mixed mine at a 2 water to 1 Robo Bubble ratio in a separate spray bottle and that was more than enough to clean my interior. Since my car is brand new, there were no tough/stubborn spots to deal with, but I have no doubt that Robo bubble at full strength would make them disappear.
I also appreciate the wonderful thank you note from Karen on the packing slip! :-)
High quality shirt and the printing is impeccable! Thank you very much
