XT2 Venturi dive/pre-dive switch doesn't move easily

[Ean86]

I'm not sure what might cause this on my XT2 primary regulator but the venturi switch provides a lot of tension compared to my backup XT2 that hangs on my neck.

I've got only 10 dives on the set (since October 2017). A few pool dives and a quarry. The backup XT2 is smooth as can be. What might cause the first to be so sticky and is there anything I can do besides taking it in to have someone mess with it?

 

[rongoodman]

Switch the two?

 

[Ean86]

Seems to be more stiff the day after the dive. I'm assuming something got in there and maybe cleaned out any lube that maybe is applied when assembled? Again, is there anything I can to myself to have it move nice and smooth or is this just something that happens with time from diving?