+ The foam is very "stable", ie it does not run down the window
+ After appropriate contact time it triggers without using excessive force even stubborn dirt and encrustations really well from
+ It is quite sufficient if you sparingly dosed and the disc is sprayed short, ie a bottle of really long enough
- You have to wipe well, because otherwise forms shortly after lighting a new fire condensation on the disc or it fogs up at least
- The smell is very dry and "still hanging long in the air"
