Article: You can find celery at most grocery stores and farmers markets, and you may also encounter it in some gardens.  For the freshest celery, consider buying a locally-grown product. You can find pre-packaged celery, but it may have been shipped from who-knows-where, stored for who-knows-how-long, and sprayed with who-knows-how-many pesticides. Buy a whole stalk of celery. Make sure that the stalk is light green, firm, and unblemished. If the stalk is whitish, soft, or cracked it may be going bad; if the leaves are wilted, choose a fresher stalk. If you're looking for a quick and convenient snack, consider buying a package of pre-cut celery sticks. Again, pre-packaged sticks may not be as fresh as whole-stalk, locally-grown celery, but they take less work to prepare if you're in a hurry. Celery is a Mediterranean plant, and it grows best in temperate climates with temperatures between 59 and 70 degrees Fahrenheit.  Celery is a long-season crop, and it may be difficult to grow in areas with brief summers. The seeds sprout best when they are sprouted indoors. You should be able to find a package of celery seeds at a local nursery or garden-supply store. You may be able to harvest wild celery seeds; refer to botanical field guides, or ask a friend who grows celery in her garden. If you grow your own celery, you can collect the seeds and use them as seasoning. With care and planning, you can ensure that you will have a consistent supply of celery from year to year. Use fresh, running water, but don't use soap or detergent. There's a chance that commercially-grown celery has been sprayed with pesticides and other chemicals, and a thorough rinsing can remove many potential contaminants. Washing can also reduce the risk of contracting any number of food-borne illnesses. You may store celery in the crisper drawer, in a well-sealed plastic bag, or in a bowl or jar with the end of the stalk submerged in a bit of water to keep it fresh.  When properly stored, fresh (whole) celery should last 3-4 weeks past the printed sell-by date; pre-packaged celery should last 2-3 days past the printed date; and cooked celery should last up to one week after it is cooked.  Celery is not always sold with an expiration date. Use your intuition: if the stalk is whitish, soft, cracked, or wilted, it may be going bad. If you won't use your celery before four weeks have passed, consider freezing it and thawing it out when you need it. If you buy a whole, fresh stalk of celery, cut off the leaves at the top; compost the leaves or put them out with the trash.  If you will be dipping the celery into a sauce or condiment, chop the stalk into pieces ranging from 3-4 inches in length. If you are cooking with celery or mixing it into a salad, chop it into smaller, bite-sized pieces, or dice it finely.
Question: What is a summary of what this article is about?
Buy fresh celery. Consider growing celery. Wash your celery. Store celery in the refrigerator until you're ready to use it. Chop the stalk into pieces, to taste.

It’s a good rule of thumb to do a deep clean on your grill twice a year. If your porcelain grill grates are really dirty, use a professional grill cleaner for a deep clean. Read the label on professional cleaners to ensure they are safe for use on porcelain grill grates. Most manufacturers will state if they are safe for use on porcelain grates. You can buy a professional grill cleaner online or at your local hardware store. Most grill cleaners come in a spray bottle for easy application. Let the grill cool down or apply the cleaner when it has been shut off overnight. Spray the cleaner all over the grates and let it sit. Then, use a clean grill brush to gently remove any dirt or food debris on the grates.  If the grates are really dirty, you may have to do a few passes with the grill brush. If there is a lot of deep grime caked onto the grates, you can also try spraying the grill cleaner and leaving it on overnight. Then, clean it off with the grill brush the following day. Wipe down the grill grates with a clean soft cloth or paper towels. This will ensure there is no excess cleaner on the grill grates so your food doesn’t end up tasting like cleaner when you grill it. Another option is to heat up the grill before you start grilling to burn off any excess cleaner.
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One-sentence summary --
Get a cleaner that is safe for use on porcelain. Apply the cleaner. Remove excess cleaner before using the grill.