I did not know WD40 is a degreaser. And yes the smell is not great but I have never had it bother me that much
It's an odd substance, I've used to to clean off gunk, loosen stuck things and clean off excess oil/grease. I went to WD40s site and looked it up.
Myth: WD-40® Multi-Use Product is not really a lubricant.
Fact: While the “W-D” in WD-40® stands for Water Displacement, WD-40® Multi-Use Product is a unique, special blend of lubricants. The product’s formulation also contains anti-corrosion agents and ingredients for penetration, water displacement and soil removal.
as far as taking apart the Minikin V2, the only thing you have to be extra careful of is the touch screen. The ribbon cable comes up through the board and is soldered in place. If you break that, then the mod would be useless.
In this video the guy takes the Minikin V2 apart but rips off the touchscreen ribbon with his heavy handed approach. The best way to get it apart would be to unsolder the red and black 510 wires from the board. That way you could tilt the board out from the top and not disturb the touch screen ribbon.
If you don't want to bother with any soldering, you might be able to lift the board just enough that you could slide the button out around it. Once the button is out you could clean it off as well as the hole it goes in from the front of the mod. The touch screen ribbon is not super delicate but I would not put a lot of stress on it, you can see how much play you have once you get the board screws out. The ribbon passes through the board and attaches to the square yellow sub board then onto the main board. You should be able to position the little square yellow board close enough to the opening in the main board so you can shake the fire button out.
Putting the button back would be easy, just slide it down the side and jiggle it back into place. You would have to look to see the orientation of the letters if that's important.
The 510 wires are durable and you can move them around to get at the screws. Just go slow and be careful with the ribbon wire. With the button out you can look through the front and see if the little white tactile switch on the board is gummy or not. Support the back of the board and see it the switch clicks easily using your finger through the hole in the case. If it is the cause of the sticking clean it up with some WD40 or alcohol on a QTip. You can get replacement switches on eBay, but that would require a tech or someone with surface mount soldering experience to replace it.
Good luck and ask away if you need any help.
ETA: Forgot to link the video...
