Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to clean polarized glasses [title] Follow the manufacturer's recommendations. [step] There is no universal type of polarized eyewear, and no universal way to keep them all clean. Different manufacturers rely on different techniques and materials to achieve polarization, so the specific care instructions for your eyewear should always be followed.

Ending1: [substeps] Do not leave glasses upside down in direct sunlight for extended periods of time. Never touch or rub polarized lenses on a bare skin. Ending2: [substeps] Check your brand's website or go to a retailer if you need specific advice for your eyewear. Regardless of your brand, however, it is safe to assume that the next several steps will be applicable. Ending3: Some eyewear manufacturers will offer solutions that you do not like for a one-time fix, while others will advise you to rely on a specialized, stronger method. If you choose to use a specialized or stronger method, follow the treatment instructions carefully. Ending4: [substeps] Always follow manufacturer's instructions for cleaning polarized glasses. Following them is usually a matter of experimenting and finding the best workmanship for the size of your glasses.

Answer format: ending1/ending2/ending3/ending4