Seeding problem

It seems that there is a “issue” with proper sealing of the UTM and seeder.
In my case there seems to be a problem with proper connection and my seeder is loosing suction power therefore seeds are not picked up.
Did anyone has similar problems how did you solve them.

What I did till now:

  1. New seeder STL and threaded the #1 hole and then added Luerlock adatper - fail
  2. Old seeder STL and threaded the #1 hole and then added Luerlock adatper - fail
  3. Old seeder STL threaded ina heated Luerlock adatper - seems promising