Mind the Lenses: How to Best Clean Sunglasses Lenses
Sunglasses are sensitive because they contain lenses that can be damaged with poor cleaning. Therefore, it is important to take great care when cleaning the lenses.
Thorough cleaning is imperative when the lenses are covered with sticky dirt, grease and oils. Otherwise, only gentle wiping and rubbing may be required. In the latter case, only breath moisture on the lenses and a swift massage or rubbing will eliminate dirt and dust.
It is worth noting that dirt and dust, grease and oils may accumulate on the lenses if it is not constantly cleaned. Again, it is necessary to know that some lenses do not require use of detergents and solutions to clean; otherwise the lenses will completely spoil. This is the case with those lenses covered with special coatings for specialized vision, such as the anti-reflection coatings which are included to aid drivers using the sunglasses lenses or other types of glasses at night.
Clearly, very high temperatures for the cleaning solution will damage the lenses if they are made of plastic. It also makes it difficult to clean. For those lenses where no water is allowed for cleaning, ensure that they are cleaned and inspected regularly to see if there is any dirt accumulating on them.
To avoid scratching the glass or plastic lenses, make sure that there is some moisture on the rubbing or wiping cloth, even if it means breath moisture or tiny water drops. Some manufacturers may specify usage of sprays for cleaning glasses if they are coated with special material, but if the sunglasses were bought without the manual, it is wrong to assume that they are not coated with special material.
When lenses are broken, it is advisable to replace them because they encourage accumulation of dirt on the cracks, and it may be difficult to remove the dirt altogether. These also pose a risk to the cleaner because they may scratch or hurt the skin. It is advisable that a cloth should always be used for cleaning or rubbing purposes, rather than using bare hands.
While rubbing or scraping out dirt from lenses, it is necessary to avoid unnecessary movements or forceful movements that are likely to displace the lenses in between the frames. This may damage the sunglasses or reduce the lifespan. It is also important to ensure that the chemical solutions are not acidic, since these may corrode metallic frames and handles.
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