I used the glass scraper to scrape those little black specs. I've noticed that the pieces scrape off much easier than normal. I also sprayed water on the paste as it dried.
-stainless steel garbage can - used the enviro cloth only, could have used the window cloth but I don't care if it shines.
One note: be aware that the enviro cloth will pick up stuff like toast crumb (from under the toaster oven) & it will stick to the cloth like glue. I had to pick out the hard crumbs. I probably could have soaked the cloth & the crumbs would have washed out easily but I was in clean mode & couldn't waste time soaking the cloth. I had to keep cleaning ;-)
Bathroom: envirocloth, paste, window cloth, spririsponge, spray bottle
I must also note that while googling Norwex cloth, I came across a product called E-cloth which is similar to the Norwex cloth but is cheaper. Almost half the price. I've read lots of good reviews for both & one lady who uses both products believes the Norwex cloth lasts longer & therefore is of better quality. I feel safer using the Norwex for its antibacterial quality. But I'm thinking I'd buy the E-cloth window cloth even though it might not be antibacterial because it is half the price. *note added 2 weeks later* the Hero brand glass polishing cloth at Canadian Tire is even cheaper than the E-cloth glass cloth. $3 for 2 smaller cloths