Kamoer x1 issue

[Tom nhia]

Hey
Recently I've noticed all my kamoers x1 arent keeping the liquids in the tubes. There's slowly more air until it's just not dosing anything since most of them dose under 2ml at a time.

Could it be because the tubes are too long or do i need to change some parts?

 

[blaxsun]

How long is the tubing and how long have you been running the current heads?

 

[Tom nhia]

How long is the tubing and how long have you been running the current heads?

Probably 5 ft total on most of them, shortest run is under 2 ft. Got all of them used but so total run time on the head is unknown, at least 6 months from personal use