The medication works relatively well. Just spray, wait and then wash with the water jet is not enough. It should be wiped with a sponge. Quite ill, however, the nozzle on the spray head. It is almost impossible to adjust these so that a wider beam (I nnenne it times "gel fog") comes out. Either this thing is all about, or there is only a thin but strong beam.
I guess that the bottle at the latest after the third washing times (ie after 12 wheels) is empty. As I drive the future but rather be back in the car wash.