Cutter not fusing all the way around

Hi Guys, I’m new to 3D printing!! I’m so sorry, but I’m so confused why I can’t get the ends to fuse together in some areas. I’ve tried increasing the heat on my nozzle to 210, and slowing down the speed to 45-55. My flow is 100, and my infill density is 90 and pattern is lines. Any advice is much appreciated!!!

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Hi, your cutter blades are splitting. This is most likely because you have a loose belt. Look up a video for tightening the belts and that should fix that.

Thank you for the advice!!

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It worked!!! Thank you so much! I was going crazy ready to sell my printer because I wasn’t qualified hahaha

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I always add a extra wall layer in Cura that fixed my issue

Is this an option on Cura like something you check off? Before slicing?