I have had a heck of a time pulling and twisting on 1/2" drip line tubing to remove it from connectors when changing my drip line configuration. I would clamp a vise grips onto it and work it for 5-10 minutes tearing and ripping until it would finally pop out. Even threw a few away I got so frustrated (they're not as cheap as they seem if you use a lot).
One lesson I've learned from this is to simply not push the tubing so far in to the connector to begin with. It seems to grab less than an inch just as well as 2 inches, with much less to pull out if needed. The other thing I finally did was to bring a pot of boiling water out and dip the connector w/tubing for a few minutes to soften it up. This worked wonders and I can now remove the tubing quickly and with far less frustration and effort.
Curious to know if anyone else has other methods of dealing with this potential source of frustration?