In one sentence, describe what the following article is about: Sheets are measured based on the size of your mattress. At a department store, sheets should be listed as twin, full, double twin, king, queen, California king, and so on. A sheet's label should give you a sense of whether It's appropriate for your bed.  For twin beds, the standard measurement is usually 66 by 90 inches for a flat sheet and 39 times 75 for a fitted sheet. However, some twins are double twins. These are the kinds typically found in a college dorm. For a double twin, go for 39 by 80 inch fitted sheet. You can get by with a flat sheet fitted for a standard twin bed. For a full sized bed, the standard size of a flat sheet is 81x96 inches. For a fitted sheet, go for 54x75 inches. For a king sized bed, you'll need a 108x102 inch flat sheet and a 78x80 inch fitted sheet. For a queen sized bed, you'll need a 90x102 inch queen sheet and a 60x80 inch fitted sheet. Mattresses come in various heights. Some mattresses are thicker than others. When picking sheets, you'll need to know the height of your mattress. Take a tape measure and measure the side of the mattress. Most standard mattresses are 7 to 9 inches high, while some can be as much as 16 to 22 inches high. The pocket size of sheets varies. The pocket size you need depends on the height of your mattress.  A mattress that is 7 to 12 inches high will need a 7 to 9 inch pocket depth. A mattress that is 13 to 17 inches high will require a pocket depth of 10 to 15 inches. A mattress between 18 and 25 inches needs a pocket depth 15 to 22 inches.
Summary: Pick sheets based on your mattress size. Measure your mattress's height. Choose the appropriate pocket size based on height.

Advantage comes packaged in individual plastic bottles. Each bottle contains one dose for your dog. Remove a bottle from the package and prepare it for use.  Hold the individual Advantage dose upright so the slender end of the tube is at the top. This end is the applicator. Pull the cap off the tube. You can also snap the end off the dose tube if it's too hard to twist off. You can also use scissors. Turn the cap upside down and place the other end over the seal at the top of the tube. Twist the cap to break the seal. Dogs should be standing to apply Advantage safely. Make sure your dog is standing up before you apply Advantage.  Be sure your dog is standing still. Have a second person hold the dog, if necessary. If your dog is nervous about standing, try using treats to coax your dog into a standing position. You can also use treats to encourage your dog to behave. You want to apply Advantage directly. This way, it will seep into your dog's skin and disperse throughout the body. This will poison any fleas or ticks on your dog's fur, and eliminate flea eggs and larvae.  Locate the middle of the dog's back at the base of its neck between the shoulder blades. You want to apply Advantage on an area where your dog cannot lick it off. Use one hand to part the fur and expose the skin. Use a disposable hair clip or hair elastic to hold the fur out of the way if your dog is long-haired or has a thick coat. This will help you get the Advantage on the dog's skin, not the fur. If your dog is nervous, you may have to have someone else hold the dog still while you work. If you're applying Advantage to a dog under 25 pounds, only apply the dose between your dog's shoulder blades. For a larger dog, apply a dose between the shoulder blades, on the middle of the back between the hips, and  at one point in between these places. Make sure you do not apply Advantage anywhere where your dog can lick.  Place the open tip of the applicator on the exposed skin at the base of the neck. Squeeze the applicator tube to release the whole dose onto the skin, for a small dog. For a large dog, release about a third of the dose. Release the other two thirds elsewhere on the dog's skin. Check that all medication has been expelled from the dose tube. This will make Advantage work most effectively.
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One-sentence summary -- Prepare the dose. Get your dog in the right position. Part the dog's fur. Apply Advantage directly to the skin.

Q: Text: To select text, click and drag the cursor until the text you want to copy and paste is highlighted, then release the click.  Files: Select the file on your computer that you want to copy and paste, or you can select multiple files by holding down ⌘ to select a group of files.  Images: In most Mac applications, you can select the picture you want to copy by clicking on it once.  The selected text, images or files will be copied to the Clipboard (a type of temporary storage) on your computer. Alternatively, ⌘+C. You can also right-click on the mouse or trackpad. If you don't have a right-click function, press Control+click on Mac, then click Copy in the pop-up menu.   The text or image will be inserted into the document or field at the place where you put the cursor. Alternatively, ⌘+V. You can also right-click on the mouse or trackpad. If you don't have a right-click function, press Control+click on Mac, then click Paste in the pop-up menu.
A: Select what you want to copy: Click Edit in the menu bar. Click Copy. Click in the document or field where you want to insert the text or image. Click Edit in the menu bar. Click Paste.

Problem: Article: On the rear of your Roomba there is a tray that fills with dirt and dust as it vacuums (also called the "bin"). Press the button on top of this tray and remove it. Dump the contents of this tray into the trashcan. You should be able to see a red semi-circle inside the tray (which may be covered with gray dirt and dust). This is your filter. This filter will easily slide out of the tray, while remaining attached on one end. Slide this out, and knock any loose dirt/dust off into the trashcan. Attach the crevice tool (the long, thin attachment) to the hose of a regular vacuum cleaner. Then turn the vacuum on and use this attachment to remove dirt and grime from the Roomba collection tray and filter. Remove the crevice tool from your vacuum hose, and instead attach the brush tool. Turn your vacuum back on and go over the filter and tray once again. This time, pay extra attention to the surface of the filter, the rubber seals, and the vents on the back of the tray. When you are finished, snap the filter back into place.
Summary:
Empty your Roomba. Remove the filter. Vacuum the tray and filter using a regular vacuum and the crevice tool. Switch to the brush tool.