I've been making my own dishwasher detergent for several months now. I've tried different recipes but this is my favorite:
1/2 cup Dr Bronner’s Sal Suds
1/2 cup water
1 tsp lemon juice
3 drops tea tree oil
1/2 cup white vinegar
However, I have the same problem with the recipes I've tried. My white dishes (white cutting boards, white spatulas, etc) are all turning brown. Does anyone know how I can stop them from turning brown? Otherwise, my dishes are turning out great, my dishwasher is quieter, and now hardwater residue.
Thank you!

Cascade is chemical-based, so I won't use it. 

