Hi everyone! I'm printing a part in Bambu Lab PLA Matt, new from box and it came out twice with the lines in the picture. I re-tensioned the belt for the second try and had the same result. Is there something I'm ignoring? Please help 🥺 I'm using a X1 Carbon

Hi guys! I'm new into 3D printing and I'm just having a go with PETG (Bambulab X1C) but the results are not the best :(. As you can see in the pictures, one side presents have stringing (I think that's the name) where the supports were (tree thin) and for some reason there are tiny holes in some areas. Why is this happening and how could I fix it? Thanks!