what are the ingredients

Non-Toxic, Ammonia & Alcohol Free, Safe for all screens.

Best way to clean the cloths? They’re getting linty and makes screen spotty.

From the Whoosh website: "Machine wash in warm or cold water using detergent (do not use fabric softener), then hang to dry (do not use your drying machine). Do not dry clean or use bleach."

Is there a gallon refill?

The only thing I could find that is made by swoosh is Sanitech in a gallon. You could always ask them directly.

Which product is better to clean I pad screens? Whoosh,Tech or mom screen cleaner

We love Screen mom we think they are great , but if you want a product that was formulated by a world renowned biochemist specializing in nano coating and is the only cleaner that was tested , found safe and approved by Apple for Apple devices (WHOOSH is the only cleaner used in all Apple stores world wide to clean Apple's stores) - then the choice should be WHOOSH! , use it risk free , if you are not 100% satisfied , send it back money back for a full refund , no questions asked