You can clean glass and windows with apple cider vinegar but you need to mix about 1/2 cup of the apple cider vinegar with 1 cup of water to dilute the apple cider vinegar.
You can either put it in a spray bottle or dip a rag in the apple cider vinegar and clean the glass or windows with it.
Apple cider vinegar mixed with water makes a natural disinfectant as well and apple cider vinegar can also kill fleas.
To kill fleas with apple cider vinegar just rub some apple cider vinegar into your dogs hair, let it sit and then wash the dogs hair out to get rid of the dogs fleas.