50/50 would be too concentrated it many cases. You can use it to clean almost anything, and it will come with directions so you know how much to use for any job you use it for. To clean glass, you'll mix 1-2 tsp. into 1 quart of water. For a heavy, all purpose spray, use 3-5 Tbsp. in a quart of water. A half and half or full strength application would only be necessary for really tough jobs and serious stain removal. We sell sets that come with spray bottles, and we also sell them separately here: http://www.simplygoodstuff.com/spray_bottle.html