Purchasing a cleaner from the store just seems silly! You're paying for basically glorified WATER! Let's grab a couple items from around the house to make our own and leave some cash in our wallets. The process is quite simple:
Distilled water (don't use tap water as it has added minerals in it that will leave a residue on your screen!)
Next, you'll fill your bottle with half alcohol and half water. Give it a shake and you are DONE! Your devices are going to look brand new.