Stains
Grease stains: in your clothing will come out with Platinum Dawn dishwashing detergent. LINK I had a favorite shirt, which I treated and washed at least 5 times which continued to come out like it went it! GRRRR. After scrubbing some dawn into the shirt, it was clean at last!
MUD: One of the things that you need to know about is Hawaiin MUD. The red dirt in Oahu stains! Hiking often means walking through the mud and anything on your shoes, shirt, etc., isn't going to come clean! A local informed us about a product (Walmart sells) called Red Clay Stain Remover that is effective in getting it out!