Removing Stains from Soap Bubble Mixture on Children's Clothing

Just regular store bought stuff, various brands they all seem to stain white clothing. I have a great mix that I make at home as well, but we were out on New Years Eve and my daughter bought bubble guns for the kids. My grand daughter and I both had white on and both ended up with stains, it is frustrating. We have tried things like dish detergent, soakers, white vinegar, lemon juice, eucalyptus oil but nothing seems to work.

I don't understand what kind of bubble blowing mixture this might be. Any my kids used was just soap. I would stop using this stuff and get non-staining mixtures, just regular dish detergent works fine.