Our nurse said just to use water. She said most of the babies they see with sensitive skin it's because of Pampers and Johnston baby products. She said even when you bath them you can use plain water you dont need all the lotions and potions.
Best products are Bepanthen, Sudocrem, almond oil (ask your pharmacist, we got small bottle for 69p) and standard olive oil. Johnston and Pampers et al try and convince you you need to spend all that money on their dodgy products, you dont.