Can't help with the ear, but can comment on dry hands after washing 10x+ above average per day for a month or two.
Switched the hand soap to Jason brand aloe vera. Instant relief, instant improvement.
https://www.walmart.com/ip/Jason-Pure-Natural-Hand-Soap-Soothing-Aloe-Vera-16-fl-oz/24818157
And Vaseline intensive care deep moisture to be applied when needed.
https://www.walmart.com/ip/Vaseline-Intensive-Care-Deep-Moisture-Petroleum-Jelly-4-5-Oz/10804610
That Vaseline product is insanely good at its purpose for me at least. It would be in the top 10 5-star products I use if I maintained a list of such things. If you have dry, cracked, calloused skin on your elbows, hands, feet, soles, ankles… holy shit, you will have improvement in just a day. Having played sports I was taught to keep my callouses in check so I trim when needed but now I also moisturize with the Vaseline product. It preserves the toughness of the callous but keeps it soft and pliable. It would probably be amazing for guitar players.
HTH.