In one sentence, describe what the following article is about: An ivory scraper is a product designed to remove yellowing and stains on ivory piano keys. You can find this tool online or at piano supply stores. Speak to a professional piano technician before you use this tool to avoid damaging the keys. There is a risk that you will damage the ivory piano keys with the ivory scraper if you use it incorrectly. If you are not sure how to use the tool properly, reach out to a professional. If the keys are really yellow or badly stained, you may want to consider hiring a piano technician for the cleaning. The technician will remove each key and clean them individually with an ivory scraper or a professional cleaner. They will know the best and safest way to remove stains and yellowing on the ivory. Getting a thorough cleaning done on the keys once a year by a trained technician may be a good option, especially if you use the piano often.
Summary: Use an ivory scraper. Hire a piano technician to clean the keys.

When using a clothes dryer to dry your blanket, keep the heat setting between low and medium. Higher heats might shrink the blanket, or cause synthetic materials like polyester to scorch. If you're drying a down or wool blanket, set the dryer to tumble. Because it uses no heat, tumble drying takes longer and should only be used if you're worried about damaging a natural fabric. Once again, cotton and synthetics are resilient fabrics, which make them totally dryer-approved (just watch out for high heat on synthetics, as they're prone to burning after a while). Once again, make sure the blanket is distributed evenly in the dryer. Let the blanket lie loosely in the barrel, and try not to bunch it up. Clear out the dryer's lint trap before you begin drying. Fluffy items like bedding tend to shed a lot of lint, which can become a fire hazard as it accumulates. If your blanket is of heavy construction or has been washed and dried many times, it should be okay to let it go through a full drying cycle at low heat. Dry delicate or loosely-woven blankets in short bursts and keep an eye on the blanket's material as it dries. Set the dryer's timer for the desired time, or else monitor the blanket throughout the drying process. Tumble drying a delicate blanket might take hours. Reset the dryer at the end of a tumble cycle and repeat until the blanket is no longer damp. Overdrying can cause shrinkage or damage. Choose the appropriate time for the blanket you're drying and give it a feel from time to time when machine drying for longer periods. Take the blanket out of the dryer while it is still slightly damp. In most cases, it's preferable to allow blankets to finish air dryingthis will help instill a fresh fluffiness in the blanket as the remaining moisture dissipates and spare you the grief of dealing with shrinking, scorching, stretching and static. Smooth the blanket out by hand, then either hang it from a clothesline or drape it over something broad and flat. Let the blanket hang until it's completely dry. A drying rack or ironing board can be useful for draping a drying blanket if space for a clothesline is unavailable to you. Turn the blanket over periodically to expose both sides to direct air flow.
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One-sentence summary -- Set the dryer to a low heat setting. Load the blanket into the dryer. Allow the blanket time to dry. Remove and hang the blanket.

Problem: Article: Secure the bottom front (tack) of the mainsail and jib to their respective shackles on the boom and the bow of the boat. There will be a small line (outhaul) attaching the rear corner of the mainsail (clew) to the end of the boom. Pull it so the foot of the main is taut, and cleat. This helps the mainsail have a smooth shape for the air flowing over it. Hoist the mainsail by pulling down on its halyard until it stops. It will be flapping around (luffing) like crazy, but that's OK for a short period of time. (Excessive luffing will drastically reduce the life and durability of the sail). The leading edge of the sail (luff) must be tight enough to remove folds, but not so tight as to create vertical creases in the sail. There will be a cleat in the vicinity of the halyard where it comes down from the top of the mast. Cleat the halyard. Using the jib halyard, raise the front sail (jib, genoa or simply the headsail), and cleat the halyard off. Both sails will be luffing freely now. Sails are always raised mainsail first, then the jib, because it's easier to point the boat into the wind using the main. Sailboats cannot sail directly into the wind. As shown above, the red zone in the diagram indicates a "no go" zone when under sail. To sail to windward, a sailing vessel must sail about 45-50 degrees off the wind and change direction by tacking (or zig-zag). Turn the boat to the left (port) or right (starboard) so it's about 90 degrees off the wind. This is known as a beam reach. Pull on the main sheet (trimming) until the sail is around 45 degrees away from straight back (aft). This is a safe place for the main while you trim the jib. You will start moving and tilting (heeling) away from the wind. A heel of more than 20 degrees usually indicates that you're being overpowered. Releasing the mainsheet momentarily (breaking the main) will lessen the amount of heel, and you will return to a more comfortable sailing angle of 10 to 15 degrees. Although the mainsail is hoisted first, it is the jib that is trimmed first. There are two jib sheets, one for each side of the boat. Pull on the jib sheet on the side away from the wind (leeward side). This is the active sheet while the other is called the lazy sheet. The jib will form a curve or pocket; trim the sail until the front edge just stops luffing. Keep your hand on the tiller (or helm) and stay on course! Let out the main sheet until the front edge just starts to luff, then pull it back just until it stops. If you or the wind hasn't changed direction, this is the most efficient place to set the sails. If anything changes, you have to adjust them in response. You have just entered the world of the sailor, and you will have to learn to do many things at once, or suffer the consequences.
Summary:
Attach the sails. Adjust your heading and sail trim for the wind. Trim the jib sheets. Trim the mainsail.