Devo 7E sticky gimbal?

I hope this isn't too far off topic, but I have a modded Devo 7E running deviationtx (NRF24L01 with A7105 coming) and I'm loving it, but one thing I'm noticing is the left hand gimbal is sticking a bit in horizontal movement (hard to make small smooth movements), just wondering if anyone else has experienced this and what you did about it? I'm thinking of spraying some silicone lubricant on it but thought I'd ask first

IMO any type of lubricant should be absolute last resort!

First thing to do is open it up and check the spring tension, then CLEAN any oil / grease OFF with alcohol and try again BEFORE going the lube route.

Even as we speak I am taking the back off to check that out

[Edit] After fiddling with the tension screw it feels a lot better