you should be able to free any blocked tube with multitudes of 50 grams ...
If I have blocked drains, I talk to the wife, or get the plunger. Wife is really good at drain unblocking, but I'm the king of plungers.
If it usually works, but requires frequent maintenance, the analysis "not steep enough" usually is correct (there are lots of other installation related issues too, like ignoring the installation instructions regarding direction and application of bends and branch couplings), but of course inspection would not hurt. Mechanical cleaning probably is required, and if the plunger can get a good seal, it's a good first step.
Having noted there's a Youtube video for everything (even if it would be better explained in a README file than a scatterbrain screencap by someone using
nano or
gedit and not understanding the problem) I would like to point out the frankly
immersive plumber experience offered by a gentleman working for Berlin plumber firm Kempinger, like in this one:
https://youtu.be/r3cNZFGUul0 -- his videos are not very censored, and the full experience is indeed offered...
On TE, I spent an hour or so at the bench yesterday evening, burning my fingers and practicing mutilating SMD caps on a PCI riser card from an old Dell 1850 sewer. I did not yet try the Carlson Cutter technique, but wiggling about and lifting one side at a time is good enough for removing caps in a pinch,
as long as the PCB is not damaged by a leaking cap (so why am I removing them then?
![Face Palm :palm:](https://www.eevblog.com/forum/Smileys/default/xfacepalm.gif.pagespeed.ic.EBDwh1hCfo.png)
). Also, I started off using my Balver Zinn as heat conductor, which did not help much. Obviously, realised once I'd read the markings on the card, it was produced with leaded solder, and switching to 60/40 made an enormous difference.
Also practiced with flux pen and solder wick. Probably should start applying flux with syringe instead, feels like it could be easier.