Agi: I only got a "boil" machine 2 years ago. Before that, it was standard hot water from the water heater and detergent. Every now and then, all-fabric bleach. Before finding this great group of guys about 6 years ago, I was all about warm washing. I never had gray or yellow whites. That's all. Maybe because here in Atlanta, we have fairly soft water, but then I never had dingy clothes living in Memphis or Rochester NY either, which have harder water. Just using enough detergent has always worked excellently with me.
Honestly, I don't know what the big deal is about boil washers because in my case, I noticed absolutely no difference in the whiteness or cleanliness of my clothes after I got it. In fact, I was a little disappointed that stains didn't come out of my dish towels and handkerchiefs. Now, after time has gone by and they have been thru the machine several times over the last 2 years, yes, they are whiter, but they are not perfect. I never got the dazzling results everyone was raving about the first time thru. That says to me that what was working for me was...working!
I put more stock in detergents. I love the way the Mexican detergents work. I love the way UK Persil works. I will say that I have always used front loaders except for about a year that I had the 1-18 hooked up, and the few months of the Lady Kenmore.
Everyone has their own way...
Toggle: Chlorine bleach is an oxidizing agent. I don't know how it works exactly, but what you describe is an optical brighter, mostly used in all-fabric bleaches like Clorox 2, Biz, and Snowy (did you guys know that Snowy is still out there?). Chlorine actually oxidized the fibers to make them whiter.
CHLORINE BLEACH DOES NOT CURE SOUR TOWELS!!! This is something in the towels that chlorine, in my experience, almost makes worse. I don't know if it is bacteria, protozoa, mold, mildew, algae or fungus, but adding chlorine bleach to a load of sour towels DOES NOT WORK! Believe me, I have friends with closets full of sour towels, sour WHITE towels, and I have seen them washed in hot water with Clorox, and they are still sour. Extraordinary means are needed to save them, hence the need for the Lysol recipe, especially when these are dark hunter green towels...