Upper thread breaks

When sewing, the upper thread breaks when the fabric gets thicker due to the pinned hem.
I had previously removed dust and lint with a brush. Now I’m looking for sewing machine oil.

Why does the upper thread keep breaking?
Right at the beginning, before the thread broke, the needle snapped.

Thanks for your tips.

Try loosening the upper thread tension a little!

I’ve also found that when sewing, you should clean and oil the machine almost every week...just like the guys used to do with their mopeds on the weekends...then you really have fewer problems....Best regards 

Hi, this could also be due to the needle.
If it’s dull, it can damage the thread.
I’d try a new needle.
Thread it again.
Best regards

Thanks

I just changed the needle because it had broken. It’s the last one I have in the machine now. And I’ve already ordered new ones

The problem still persists even after cleaning and oiling.
I then tried to sew a zigzag stitch, but it wasn’t a zigzag stitch at all—it was something completely different

Now I’m looking for a repair shop