Why change what you do normally at home?
Have you had a look to see what the chemicals are used to make Dr Bronners, and compared them to what you use in ordinary soaps or washing detergents? And have you researched to see if Dr Bronners changed its formula about the time you started to develop saddle sores?
And what sort of saddles sores are they -- the deep-seated lump, the hair follicle irritation or the skin rash type?