Reddit mentions of DeoxIT D-Series D100S Spray, 100% Solution, 57 g, no solvents, metered one-Shot Valve dispenses 100% DeoxIT

I have an iPad Pro 12.9 that I got in 2016 (model A1584). Yeah, It’s always been a slow charger, fortunately, it has good battery life (big battery). My experience is there are three keys to good charging speed: 1) Get a good brick. I like the ones from Anker, I have evaluated others. 2) Cables matter and go bad, fail in different ways. Use Apple or Apple certified. These are really good ones and hold up the longest (personal experience): Anker Powerline+ II Lightning Cable (6ft), MFi Certified for Flawless Compatibility with iPhone X/8/8 Plus/7/7 Plus/6/6 Plus/5/5S and More(Red) https://www.amazon.com/dp/B071JR45HW/ref=cm_sw_r_cp_tai_vCZQDbFBMXMHX. 3) Keep the cable and device lightning connector contacts clean. It won’t matter how good the charger or cable is if there is too much crap/oxidation on these. I use a spray called “Deoxit” from Craig Labs, not cheap again, but it is safe and lasts a long time. Shop around. CAIG LABORATORIES D100S-2 CONTACT CLEANER, AEROSOL, 57G https://www.amazon.com/dp/B00M9JN0PM/ref=cm_sw_r_cp_tai_1PZQDbY69C3CF. This is great for a variety of purposes.

Yes, you can get somewhat better charging performance by doing all of the above. If you have an in-line USB current/voltage/power meter (Geek here) you can prove it to yourself. These are also really useful for telling you when to throw out a bad cable or charger or to help figure out which isn’t working.