Some Micro Jets/Spinners not working

[shanowells]

Ive added a new line to my irrigation system and only the 1st and 3rd micro jet actually works - no water comes out of 2nd and 4th. The line is slightly higher than the solinoid but all jets are at the same level so not sure how it can be a pressure thing
any ideas?

 

[WorthFlorida]

This just showed up today, Jan 2nd.
Exactly what part of micro irrigation. Drip, micro rotary head, or spray heads? Usually there is dirt jammed inside the very small tubing or at the emitter. You can take something like a tooth pick and push to in the spray head or emitters.