Important tip for use

I recently bought myself 2 times as vials (not purchased from Amazon) Last night we were haunted by black ice and in the morning the cars were ziehmlich well frozen. So I brought the Snow removal, strong and sprayed onto the windscreen and behold, no reaction at all! For such layers of ice that means not at all good for.
This morning was just a "normal" ice on the windows, here the medication works quickly and reliably.
IMPORTANT: You should use it only on the front and rear window, because here, the residues can be removed with the wiper, stay on the side windows, the residue freeze on the one hand while driving quickly on the other hand, the disc will not therefore particularly well clear.
CONCLUSION: In front and rear windows and light ice TOP!