It uses a suctioning feature to attach it.
Using suction.
A partial vacuum between the compressed suction cup and the flat surface.
You can improve suction it by moisturizing it's edges, this makes it stick to something longer and stronger.
because you are pushing air out of the space between the window and the suction cup
as we know that suction pump stick on a smooth non-porous surface but rough surface contains pores due to which suction pump is not able to maintain grip with the rough surface.
Suction cups that help it stick
When you stick a suction cup on a window you force the air out of the suction cup and you create a high pressure vaccume keeping the suction cup on the window.
stick that clock in youre ass
I think so but I'm not sure
using suction cups called tube feet
Have one stick be twice the length of the other. With the double length stick, you would split the clock face in two, and with the regular length stick you could split one of those divisions into another two, effectively creating three divisions. Another way to look at it is to place the double length stick from 12 o clock to 6 o clock, and the regular stick from 3 o clock to the middle of the clock.
It sticks best to smooth and dry surfaces.