I love this stuff! It truly does the best job on glass - there are absolutely no steaks. It comes in an aerosol can and sprays as a foam. My dogs are constantly leaving paw and noseprints on my sliding glass door, which means I'm frequently cleaning it. I usually have to go over it multiple times with liquid glass cleaner because of streaking. It only takes once with Sprayway. It has a really nice, pleasant smell, and is priced comparably (I paid less than $3.00 for a can) to other cleaners. I'm not sure what the active ingredient is, but the can reads that it contains no ammonia. Highly recommended, especially for those who are constantly cleaning glass!