Further to my earlier comments about the rice - I’m looking for a good explanation about why rice isn’t a good idea. So far I’ve mainly found studies commissioned by phone repair companies. so this comes some disclaimers about source impartiality.
There’s results from one study:
- Leaving the device in an open room removed more moisture than putting in it a bag of uncooked rice.
- After 48 hrs surprisingly little of the moisture was removed.
From a different study (has some flaws, though!), using sponges to determine how effective desiccants are:
- Sponge in air lost more water than sponges sealed in with desiccant.
- Of desiccants tested, uncooked rice was least effective.
Finally a BSc project:
- Silica outperforms all rice variants tested
- 500g of basmati rice removed all moisture, but needs 48 hrs to do so.
What I took away from reading these and other sources is:
- disassembly of the device really helps
- desiccants can help remove the last traces of moisture (but don’t do better than air if there is a lot of moisture)
- for the above, leave electronics in the desiccant for at least 72 hrs
- don’t use any desiccants that produce dust, as this can enter the device and, coupled with residual moisture, make things worse. I’d avoid shaking or mixing rice with electronics inside for this reason. I’d even avoid rice altogether for that reason.
- silica gel beads (like the ones in those little bags that you sometimes find packaged with various goods) work best. No dust, good absorbency. Make sure they’re dry first - they can be re-used by drying in an oven at 60 C.
- heating the device is generally not recommended.
The real difficulty is what happens when the moisture is salty (sea water, soup, …), as then you’ll need to remove the traces of salt - which is sometimes done by rinsing in water - which obviously can introduce more moisture damage! As always: if unsure, contact a repair professional as soon as possible.