As far as washing goes, if your skin's very sensitive and prone to cracking or irritation, just don't use soap. Any chemist will sell you aqueous cream, which is usually used as a gentle moisturiser, but it can also be used instead of soap as a skin cleanser. As a skin cleanser, it doesn't dry the skin out at all, and you can also use it for moisturising so you don't need to carry around lots of separate tubes of stuff.