Did a first clean for a customer only yesterday who had dropped his previous cleaner for leaving the frames.
Frames are only tough the first time you do them. Our method on a first clean is a damned good scrubbing on every inch of frame and glass. Wait five minutes for the runs to die down (better still, do another house) then back and clean the glass only to leave them perfect.
After that first struggle, frames are clean and just need keeping that way.
Vin