How often do you wash it? My suggestion would be don't wash it?
When my boys (DD had thick curly hair from when she was born, so I used to wash hers with gaia products once a week to once a fortnight) were that tiny, I only washed their hair if it had obvious yuck in it (like spaghetti or weetbix!) Otherwise I very rarely actually used shampoo or conditioner to wash it. I would just rinse some water through it.