I did not have to detach the heating coil from the plate in order to remove the tubing.
I found that the check valve was clogged with debris on my unit. Blowing it out cleared the clog. My unit's check valve is built into the tube that goes from the reservoir to the coil, so I only had to remove that tube to solve my issue.
The barrier to repair is people going into their phone using the wrong or worn-out tools. Pentalobe isn't a barrier - it's just a signpost saying "you're doing it wrong, get the proper toolkit".
Going to your local hardware store to buy a set of screw drivers is NOT going to lead to a successful repair, even if pentalobe were not part of the equation.
No one should attempt repair of a smartphone without the right precision tools.