Do yourself a favor and discover the magic of BIZ detergent additive. Love the stuff...can be used for all kinds of stuff beyond washing. It even says for super tough stains, just replace your detergent entirely with BIZ!
I Should Watch The Use Of Cheer In Vintage Machines
Used some of the vintage "Colour Guard" formula in my Hoover TT and it dulled the finish of the aluminum tub. Firs time that had happened and was gutted that the beautiful shiny finish is now gone.
Even when using that version of Cheer in the (now sold) WP portable or Miele one noticed it didn't rinse well and rinse water often had a "grainy" quality.