Okay, so sometime back i bought these 2 parker 51 lookalike pens to try out hooded nibs(which I really liked). Now, one of them has developed skipping an hard starting issues, because I'm a lefty and many paper fibres and gunk are stuch in the grip section. I would really like to open it and give it a thorough clean, and it would satisfy me very much so. Since it is a very cheap pen (<$1), I did not hesitate to carry out repairs myself. I watched a few tutorials and realized that the feed can be accessed by rotating the grip section on its threads.
Now, I tried this, with the result that it worked magnificently on one pen (the good one) and god help me but for the life of me i can NOT open the other one. I have tried everything, every largest amount of force I can muster, but I can't do it. Now, I as it is a relatively modern pen, I don't think the threads are covered in shellac, but in some kind of glue. Again, I could not find any traces of anything on the threads of the other one(they are the same in every way).
What should I do?? Please guide me.