The agent saves definitely buying a new swim goggles if this the "original" anti-fog protection loses time after some time. Spray can spray immediately before swimming, shortly distribute a finger on glass and complete 1-2 minutes / dry. Think the glasses should this in any case be dry. Then drag glasses once by water and, drop into the water. Despite 1.5 hours swimming and many paths - also apnea swimming underwater - no fogging of glasses and always enjoy clear visibility. Have the spray now already applied several times - each time with the same result: A clear view. Does what it says. If the spray buy immediately.
