yonika I watched the videos and a few things. Any deposits on the Gicleur will prevent the surfaces mating perfectly and you will get some flow….all you are getting is a drop or so but super slow. It won’t affect anything. Especially not the blooming. In a perfectly closed system e.g. with a blind filter…If you fill the headspace, then 1 more drop, just one, will rase the pressure to 9 bar, or whatever your pump is set to. I would also suggest a 30s bloom is quite a long time and unless you are noticing a radical change in shot quality, one of 15-20s might be just as good.
If you really want to stop it, remove the gicleur and with fine wet and dry, flat down (well more burnish) the end…be careful, because you want to keep it flat, you are not really trying to remove metal so much as clean off any nibs.. This will help the system close completely. The needle isn’t tapered, so logically it has to be smaller than the hole, this means bringing the surfaces together well will help with the sealing.
Just a small thing, I ask people to upload to YouTube as unlisted, because a video will stay there forever if it’s left, same as photos uploaded here directly (because behind the scenes, they are not stored here but on imgur (again probably for ever)
Your video will expire and then the post may not be so helpful after 11 march, I have noticed this on other peoples videos as well, and I keep meaning to mention it but always forget.