Hi Andrey, Thank you for your feedback! Please confirm if you installed the product per the instructional guide?
Based on your feedback, it does not sound like the wipers are performing as expected. Please double-check your installation, as you may have missed a step.
If the issue is not related to a bad install, then please contact us directly and we will express ship you a new set of wipers. You do have 12 months warranty after all.
I hope to hear back from you soon.
--
Wipertech.