Re: LG g3 repair
You can use anything from 70% drugstore alcohol to pure (which will be about 98% by the time you've opened the sealed bottle) alcohol. It's not the percentage that matters, it's the speed with which you get the phone soaked in it. 30 seconds? You'll probably have no problems. An hour? the phone may start dying in a few months to a year. A day or so? You're wasting your effort.
My standard line, after many years of saving phones that fell into water, is that if your phone falls into water as your pants fall down, get your phone into alcohol before you pull your pants up. Any pure alcohol (not the stuff you drink, the stuff you rub on your arm before getting an injection). You want to wash all the salts, minerals, impurities and dirt out of the phone and get it dry immediately. So you can't wash it in water, unless you have deionized, triple-distilled water handy. Alcohol isn't water, (well ... the percentage that's not alcohol - like 30% in 70% isopropyl alcohol) is water, but the alcohol is adsorbing [that's not a typo, it's not absorbing] the water in the phone as it's washing the junk out of the phone because it's still a liquid even though it's not water.
The problem isn't water. Pure deionized water won't hut any phone - you can operate the phone under water (if you could keep the flow of electricity from ionizing the water) - it's the impurities that cause problems. Some of them dissolve metal, so they destroy connections and components. Some of them conduct electricity, so they create shorts. And ions conduct electricity, so the shorts an ionized path created can burn out a component. Even if you alcohol-clean the phone a few hours later, some of these impurities have become chemically bonded to parts of the phone, and some of the shorts are already there, even if they're not conducting much current. (As they conduct current, they're charring the board they're sitting on just a tiny bit, and the char is a conductor, conducting more current, causing more char, etc., making the damage worse over time - even though you put the phone into an alcohol bath only 3 hours after it got wet.)
And putting a wet phone into a bag of dry rice? That absorbs the water, concentrating the impurities, making the damage much worse. Yes, it dries the phone, but as I said, water isn't the main problem. So instead of a 0.001% concentration of sulfuric acid (from sulfur dissolved in the water), which the alcohol turns into parts per billion or less, you're creating a 10% (or stronger) solution and the phone is dissolving inside every time the humidity goes up, or you bring a cold phone into a warmer room and there's a tiny bit of condensation. Whoever came up with that bit of nonsense should be sentenced to life in a bag of dry rice. He's destroyed more phones than you want to count.
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