Re: How much detergent?
Here's what I do. Be warned -- my philosophy is lots of detergent and lots of rinsing. My water is probably medium in terms of hardness.
I add vinegar to the first prewash to help break down the ammonia salts. I add the maximum amount of free & clear detergent plus a full scoop of oxyclean to the long, hot wash with an extra rinse. I have a front loader and do all of that with no spin.
Finally, I give it one more quick cycle (not just rinse) on cold with spins to rinse the heck out of it.
Janeen in Texas
Married to the greatest guy around
Homeschooling Big and starting Kinder with Little this year