Ingredients 
3 Tbsp. vinegar
1/3 tsp. pure liquid vegetable soap (like castile soap)
2 cups water

"Pour each ingredient into a recycled spray bottle, and you'll be cleaning green in no time!"

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Personally, I will use Simple Green, found at most grocery and home box stores, to clean the frames, both inside and out. I have found the all-purpose cleaner does a great job and I highly recommend it. (It also cleans windows.)

http://simplegreen.com/images/products/details/2700000113033.jpg
Happy spring and happy cleaning!

-Amelia