In one sentence, describe what the following article is about: Aerodynamics play a crucial role in swing bowls, and the longer a ball has been in use, the more its surface changes over time. Balls that have been in use for 20 years or more tend to effect a “reverse swing,” which means that the technique used to pitch a natural outswinger may result in an inswinger instead. The primary seam of a cricket ball runs along the ball’s center, creating two halves. Polishing one half will decrease air resistance on that side, causing the ball to swing in the direction of its other, rougher side when thrown. Rub it in with your trousers. Repeat frequently throughout the game, in between each delivery. Encourage them to shine the ball further while it’s in their possession during the match.
Summary: Select a relatively young ball. Choose one side of the ball to polish. Apply spit or sweat to the polished side. Inform your teammates as to which side is which to ensure consistency.

Get out a sheet of paper and draw a simple design using a dark-colored pen. If you don't know how to draw, find a simple outline online and print it out. You can also tear a page out of a coloring book. If you can't find one, you can use a plastic zippered sandwich baggy instead. Plastic wrap may also work; be sure to tape it to your work surface, over your design. As a last resort, you can also try wax paper. Avoid parchment paper. It will absorb the glue and make the window clings difficult to remove later. Measure out 2 tablespoons of white school glue and put it into a bowl. Add 2 drops of dish soap. Stir in some liquid or gel food coloring. How much food coloring you use is up to you. The more you use, the darker and more vibrant the color will be. You can also use liquid watercolor instead of food coloring.  If you don't care about the window clings being translucent, you can add a few drops of acrylic paint instead. If you want to make more colors, repeat this step for each color. Stir in some glitter for a more sparkly effect. You want the paint to be thick enough so that it will be sturdy. Avoid making it too thick, however, or it will run and not dry properly.  Make sure that the colors touch, or your window cling will fall apart.  For a neater finish, outline your design first using glitter glue or a glitter glue pen. Puff paint may also work. The window clings will become more translucent as they dry. If they still appear milky, they may not be ready yet. Take a peak under the template to make sure. Do it slowly and use both hands. If the window cling is very large, you may have to pull it off bit by bit. If the window cling is difficult to pull off, it may be too thin. Paint another layer of glue on top, let it dry, and try again. If your window cling is still too difficult to pull off, stick it in the freezer for a few hours. Press the smooth side (the one that was against your template) against a clean window. For a sun catcher-like effect, place it in a bright, sunny window.
++++++++++
One-sentence summary -- Draw your design. Slip your design into a plastic page protector. Mix the glue, dish soap, and food coloring. Apply a thick layer of paint to your design with a paintbrush. Let the window cling dry overnight. Peel the window clings off. Use the window clings.

Problem: Article: In the context of the iPhone community, jailbreaking means removing the many restrictions Apple has implanted in iOS. For those who are very committed to having a customizable iPhone, this is perhaps one of the best options. However, it isn't for everyone.  Check if jailbreaking your iPhone will void its warranty. Unless you are very experienced with jailbreaking, you may want to wait to jailbreak your iPhone until the Apple warranty expires 1 year after purchase.   Apple has attempted to create an environment that--because it is highly regulated--is safe for virtually all users. You don't have to worry about malware or scams like you would without the protections provided by Apple restrictions. Make sure you have a backup of your files before you make any switch, just in case anything bad happens.   Update iTunes to its latest version. Back up your iPhone on iTunes and/or with use of a cloud. Select a jailbreak program. Programs like RedSn0w or RageBreak are options. You should research the newest and best programs for jailbreaking your iPhone model. There are a number of options out there, but determining which is best can be tricky unless you know people who have had success with one particular program. These are, after all, not Apple-approved programs and thus have not been professionally vetted. Many of these programs are updated to work on particular versions of iOS and not on later varieties (often because Apple intentionally alters the operating system to prevent jailbreaks). It is very common that, for example, a program can work on iOS 8.1.1 but not 8.1.2. There should be information available discussing what the program can and cannot do. You will actually have to download the file to a separate computer in order to complete the jailbreak process.   Download a jailbreak program onto your computer. Install the program onto your computer. Remember, it may provide you a passcode to use later. Do record it and keep it at hand. Download the latest iOS firmware. You can find the firmware file [iphonehacks.com/download-iphone-ios-firmware here]. When you run the jailbreak program as an administrator, you will need to select this firmware file. Check that your phone and computer are connected to the same wireless connection. Place the iPhone in device firmware upgrade (DFU) mode. (To put the iPhone in DFU mode, you should hold down the Power button for 3 seconds. Then, hold the Home button down with the Power button for 10 seconds. Release the Power button while keeping the Home button down.) Turn off the phone and connect it to the computer. Then, you will prepare to place the programs you just downloaded on the iPhone. The jailbreak program should activate on your iPhone. Release the home button on the phone. Wait for the iPhone to reboot. After the jailbreak tether is activated, you will be asked to place it in DFU mode again. Your iPhone may need to reboot a few times. Find the IP address your iPhone uses. It is listed in the Settings app in the Wi-Fi area. Launch the terminal on your computer. Type the following command: “ssh root@<IP address>.”  (Type your iPhone’s IP address between the brackets). Type the password that was given to you when you installed the jailbreak program. Cydia is an application that will allow you to download new programs to your iPhone after the jailbreak. Some jailbreak programs will automatically install Cydia, and so there is no need to install it separately. If the program that you used did not, then type the following code into your Terminal: "wget -q -O /tmp/cyinstall.sh http://downloads.kr1sis.net/cyinstall.sh && chmod 755 /tmp/cyinstall.sh && /tmp/cyinstall.sh." You should have a Cydia app on your Home screen. Search for a program that will allow you to customize substantial parts of the iPhone interface, such as text or iMessage colors. Two of the most common options are Winterboard and Dreamboard, but others exist as well. Install it to your iPhone. A new app should appear on your home screen. Check the mark next to the message bubble colors you want to use. There are a number of colors you can use with outgoing and incoming messages.
Summary:
Understand what it means to jailbreak your iPhone. Update programs and save your files. Install the jailbreak program. Make sure the computer and iPhone are prepared to be linked. Complete the jailbreak process. Install Cydia (if applicable). Reboot the iPhone. Launch Cydia. Select the icon of the new customization app on your home screen.