How to clean swim goggles
Rinse the swimming goggles--inside and outside of the lenses, eye cups, straps and all--in cool, clear running water. Tap water is fine unless it’s highly chlorinated. If you don’t have access to clear running water, dip the goggles in a container of cool, clear water several times to rinse them.
Moisten your fingers in soapy water--dish soap works fine--and rub the goggle straps as needed to clean them, being very careful to keep the soapy water from coming into contact with the goggle lenses or eye cups. On some, but not all swimming goggles, you will be able to remove the straps to make this process easier.
Rinse the goggle straps thoroughly again to remove any traces of soap. Keep the goggle straps below the goggle eye cups at all times as you do this to help prevent the lenses or eye cups coming into contact with the soap. If you do get soap on the eye cups, rinse them thoroughly as well.