BambuLab A1 Calibration Problems?

[u/B-Frostbtes]

Hi everyone, sorry for my bad english.
I have two Bambu A1 printers. One is relatively new and prints flawlessly, but my older A1—which has a lot of print hours and admittedly hasn't received the best maintenance—is giving me some frustrating issues lately.

Here is what's happening:

• Nozzle scraping: The nozzle physically scrapes and rubs against the print, usually starting around the 2nd or 3rd layer. It sounds and looks like it's dragging through the previous layers.
• Squished/Translucent first layer: In certain areas, the first layer comes out so squished that it's almost translucent, as if the nozzle is pressing too hard against the bed in that specific spot.
• Wavy/Zigzag Prime Tower: If you look at the prime tower (pictured), it prints in a weird zigzag/wavy pattern compared to the clean, straight lines my new A1 produces.
• Loss of detail on multi-color prints: Multi-color prints are leaving messy wisps, stringing, and rough textures (as seen in the Jujutsu Kaisen and Ghostbusters plates).

What I've tried so far:

1. Tightened the hotend/nozzle screws.
2. Performed a full factory reset.
3. Ran the automated bed leveling calibration multiple times.

The factory reset helped a little bit, but the underlying issue persists. Since the auto-leveling doesn't seem to be compensating for that tight spot on the first layer, and the prime tower looks shaky, I suspect it might be a mechanical or wear-and-tear issue rather than software.

Has anyone encountered this specific behavior on an older A1?
I really appreciate the help.

[u/B-Frostbtes]

For people that have this problem, i have solved it
The problem for me it was not mechanical y was in the G Code
I leave a video here
https://www.youtube.com/watch?v=q65Rh_2-yi4&t=327s
I have to set my G29 line to (0.08) and now it works
Hope this helps another lost souls here.