Ikea Lack shelf wall mount

Hello!

I have just mounted 3 lacquer shelves (110cm) on the wall. Unfortunately, 2 of the 3 are not level when viewed from the side, meaning they are slightly tilted forward and downward. It is certainly not due to the mounting - all 3 are firmly fixed. I feel that there is too much play inside the shelves.

Anyone have a tip?

Thanks in advance.

Regards, micha

Simply stick a little painter's tape on the front end of the metal rods and the shelf is straight again...