Basically you won’t put anything additionally in the bucket and there are any tinted windows do not use ammonia.
If you are dealing with brand new glass and if its tempered glass I would advise not to use a blade.
If dealing with tempered glass you can use alternative methods like using scrub pads or melamine pads or steel wool along with using chemicals that break the bonds of what ever debris is on the glass.
I would be surprised if an insurance company would replace glass you scratched due to you contravening the manufactures cleaning instructions.
