Xiaomi Mi Robot Vacuum anti Carpet Tracks

I own my Mi Robot now for around 5 Month. It was primarily bought for
our Carpet in the Living Room (ca. 40 m2). The first thing i noticed were
the ugly Wheel Tracks he leaves behind him... I started to build a sort of
Comb to place behind the wheels. With the 3 try the tracks are almost gone.

It's a simple Hack, but it works good for me. I use double sided carpet tape
to put it under the vacuum. Leave the center-Section free for the sign.

Maybe someone has the same Problem... ;-)