Fenix 6X Pro Back Button Extremely Hard and Doesnt Click

Squirt a little WD40 around the button and press it a few times and it should sort it.  I had that problem on a 5 Plus and it worked nicely.

First of all thanks for the reply. I did the suggestion in the link you provided and it worked. I honestly didn't think it would work. Because the watch was bought brand new 3 months ago and has hardly been used. I didn't think there could be such a problem with a 3 month old product. Going back to our topic, this method really works. Thanks again for your help.

In user manuel " Avoid chemical cleaners, solvents, and insect repellents that can damage plastic components and finishes." says therefore i didnt try this suggestion but thanks for reply.

No problem.  I had tried washing mine but after 2 or 3 days it was bad again.  WD40 actually worked.

I didnt only try washing. I tried other advice too.

" 

I Rinsed My Watch but the Button Is Still Stuck

If the buttons of the watch are still sticking or unresponsive after rinsing, a more thorough cleaning may be required to restore functionality. To clean your watch, follow these steps:

1. Fill a small bowl with lukewarm fresh water.

2. Place the watch in the bowl and allow to soak for 10 minutes.

3. Remove the watch from the bowl and rinse thoroughly under a low-pressure faucet.

4. Shake the excess water from the watch and allow it to air dry completely."

   Maybe just washing wouldn't be enough for me, I don't know. 

Yes I had tried that - washing

Kartel1 said:

does not click like other buttons when pressed

Garmin's buttons can sometimes feel imprecise. It can take 2 or 3 presses at slightly different angles for the keystroke to take. I find that turning on vibration on key presses makes it much easier to confirm that a keystroke has been accepted.

The settings are in Menu -> System -> Sound -> Key Vibe

You can also turn on beeping for key presses but I find that to be annoying.

Thanks for advice.