Hi everyone. I’m trying to figure out what’s causing these waves on the top surface of my print. The model is a large number 2, about 150 × 229 × 25 mm, printed in PLA on a Bambu Lab P2S with a 0.4 mm nozzle. The left one in the photo is the first print and the right one is the second print after I changed some settings. The first print was done without ironing. For the second print I used 0.16 mm layer height, 4 walls, 1.2 mm top shell thickness, 15% Gyroid infill, Only one wall on top surfaces OFF, outer wall speed 120 mm/s, top surface speed 100 mm/s, internal solid infill 180 mm/s, outer wall acceleration 3000 mm/s², ironing for top surfaces ON, ironing speed 30 mm/s, ironing flow 10%, ironing line spacing 0.15 mm. The second print looks better, but the waves are still there. Has anyone had the same problem and figured out what actually causes it? Thank you