Yes indeed, karmalady, that's mostly what I do. However, I follow the instructions in the booklet if I need to re-thread from scratch (I can't manage instruction videos)
I also agree about changing needles and using good thread - although as OP's needles are breaking I am sure she is right about the timing and does need an engineer to look at it.
I think with any appliance, the more complex, the more likely it is to break down. So I treat my overlocker carefully, and clean it as karmalady says. I find that an old baby's hairbrush is useful. I also think that overlockers tend to clog more than ordinary machines, mostly because they cut, but also the type of fabric you use.
But sadly, OP, I think if you have tried all of these suggestions and they don't work, you will have to get it 'looked at' - the upside is that it ill come back (I hope) in perfect order!