How do I fix this push button?

[rodia77]

Years ago I decided to change the battery in my AMW-707, and I messed (or I thought I messed) something up in the process: one of the push buttons wouldn't spring back (it had worked fine before the disassembly). The way I remember it, I thought I must have lost some small part important for that button action. I planned to send the watch to Casio to fix it for me but in the end I never have.

Fast forward to today, I had a look at the watch and nothing seems to be missing, it's just that that one button seems a bit lazy springing back. It looks like this (sorry for the poor quality pics):





And the movement has those contacts, obviously:



Is there anything I can do myself to make that button more responsive? I was thinking treating it with WD-40 (either regular or 'specialist, fast-drying contact cleaner') and/or some oil/lubricant. Or should I just not mess with it more and send it to an authorised service (I'm reluctant to do that, trust issues etc, but will if you advice it to me here strongly enough). Cheers!

[is that my watch]

question can you push the button ok but then stays their till you push the button from inside? if soo most not all of these ones have a little tiny metal clip with a spring between the clip and the button to restore tension as soon as you let the button go ... so could be missing that ..

it easy to knock them out some times even if not actually removing the module and just doing a bat swap out soo could be that is that the time&tide one now ? .

[rodia77]

question can you push the button ok but then stays their till you push the button from inside?

No, it springs back, just slowly and weakly, like it needed some greasing. That's why my ideas with WD-40 and lubricants.

it easy to knock them out some times even if not actually removing the module and just doing a bat swap out soo could be that

As far as I can tell after having quite a good look today, those clips (that look a bit like metal washers) are all in place.

is that the time&tide one now ? .

I'm sorry, I don't understand the question.

Edit: Ah, if you're asking about the watch features, it's an 'outdoor' model and IIRC it's supposed to be useful for fishing, but I can't remember if it was temperature or tides or moon phases... Something there, though.

[is that my watch]

yeah mines a moon phase / tidal graph but the lugs busted off so was waiting to find a non working one with a decent case but for now they are boxed up my spares are ant looked at fixing owt in six months or so

sounds like a build up of crap around the button might be worth using a bunt needle or something and scaping around the outside of the button to free it up . have had to do that on a few casio's .