Tell me how to take care of my cultured pearl necklace in an article of 200-250 words. The tone should be casual yet knowledgeable. Include tips in these 3 categories: cleaning, storage, and maintenance. 
1.	Cleaning
Pearls are more fragile than other gemstones. Cosmetics, perfume, and hairspray can dull a pearl’s luster, so don’t put on pearls before applying these products. After wearing your pearls, wipe them with a clean, soft cloth to remove body oil and perspiration.
 
2.	Storage
Pearls scratch easily, so they should be stored separately in a lined jewelry box or a soft pouch. Storing pearls for long periods in an airtight container can lead to dehydration, brittleness and cracking. This is why most jewelers recommend wearing pearls and exposing them to fresh air and natural humidity as often as possible. Just don’t wear them in a hot tub or swimming pool or while doing housework. Some common household chemicals and cleaning products can damage pearls, including chlorine and ammonia.

3.	Maintenance
A pearl necklace should be taken to a jeweler for restringing if signs of wear are detected. Be sure to ask the jeweler to knot the string between each pearl to keep the pearls from rubbing against each other. The knots will also help avoid losing pearls should the string break. If you have a pearl necklace with multiple strands, most jewelers will recommend restringing all strands at the same time regardless of wear.