DO NOT DO THIS! This has ruined the mesh part of my shoes. The baking soda and hydrogen peroxide has made my shoes have yellow and brown splotches all over them. This is a horrible method and she has ruined my $130 shoes.
Just FYI, you can't make laundry detergent at home. You can make laundry SOAP but there is a difference. Soap also can damage you machine as it's not designed to work with soap