Bambu Lab A1 Combo 3D Printers base plate issue

[Shraddha]

I have a Bambu Lab A1 Combo 3D Printer. Initially, the printer worked fine, but now it prints without sticking to the base plate.
As a result, the second layer and subsequent layers start getting smudged, eventually forming a blob.
1. No errors on the screen.
2. Nozzle temperature is 230°C and base plate: 65°C
3. Printing speed: 100%
4. I'm using generic PLA

image1 (3).jpeg

What could be the issue?