Cut lines are imperfect and wavy

I cleaned my Glowforge according to the steps Glowforge provided. But after I cleaned my Glowforge, my cuts are not cutting correctly. It creates a wavy line. Horizontal cuts are fine, but the vertical, diagonal and circle cuts have wavy lines. The picture below is of the earrings svg file which I did cut before and they were fine. Now the after picture shows how distorted the lines are.

Please let me know what I did wrong? I don’t know how to fix this. Thank you in advance!

Welcome to the forum.

Check for a cracked or broken wheel, incorrect belt tension, or debris on the rails or belt.

Did you loosen the belt to remove the carriage plate?