I’ve been using my potassium hydroxide liquid soap for nearly 3 years but sometimes I am wondering if the soap really clean the clothes compare to store bought. In my eyes they do but in scientific I am not so sure.
Do they smell clean as they come out of the washer and again as they come out of the dryer? Do they still smell clean when you wear them the next time? Do your linens smell clean when you use them after the wash? Does the homemade laundry soap remove simple spots/minor stains without pre-treating?
If the answer to those questions is yes, I would be satisfied.
The place I find gives me the best smell test evidence is right out of the dryer. If my husband's t-shirts still smell of body odor out of the dryer, then I am not happy with the performance of my laundry soap. The only time I have experienced that happening was when I switched my recipe a bit, used less soap in the laundry in conjunction with minimal water (HE machine). I found using double the soap of that particular formula (it's still a lot less than store bought detergents recommend) and making sure to double rinse, there is no body odor smell as the undershirts come out of the dryer.