Here's just a sampling of what you can use straight ut of your home:
Using White Vinegar
Mix the following on a spray plastic bottle:
1 cup white vinegar
1 cup isopropyl alcohol
1 cup water
Shake (not stir) then off you go.
If you have a Windex glass cleaner, you can make it more potent by
By mixing about 1/4 cup of lemon ammonia with 1/2-1 cup of Windex and 1/4 cup of white vingar, you can have a real good glass cleaner.
BUT if you still wanna buy, then Windows and Johnson&Johnson are good brands.