If simply wiping with the soft cloth doesn't do the trick, dampen the cloth with distilled water, not tap water. Remember to wet the cloth, not the screen. Then dry with another soft, lint-free cloth. You can also use cleaning wipes. Just check the label and packaging to make sure they are ammonia- and alcohol-free.
While the first rule of thumb for a laptop is not to touch the screen, you have no choice to do that with touch screen laptops. However, just follow the same cleaning instructions as noted above. These same rules apply to an LCD TV screen, by the way. With stubborn fingerprint marks, you can add a little isopropyl alcohol to the distilled water. The alcohol will help dissolve the natural oils left behind by your skin. A 1-1 ratio of water to alcohol works best.
Laptop screen repair is a bit of a misnomer
If you've dropped your laptop or left it out in a bitter cold car, you can tell a laptop screen is cracked when you can't see everything that's on the screen or when it looks like there's an inkblot on it. You can also break the screen by carrying it while holding onto the screen, too. Once it's cracked, there is no repairing it. It's time to look at replacement laptop screens.
The simplest way to get your laptop up and running again is to take it with you as you shop for laptop replacement screens. A sales associate can help you find a new screen. Some retailers have staff members trained in repairing computers. You can pay a fee to have the new screen installed. If you want to save money, consider doing it yourself. A screen is not difficult to replace. Laptop screen replacement instructions can be found on several internet sites. The only tools you need are a couple of screwdrivers and patience.
With a little bit of TLC, you can keep your screen and the rest of your laptop in tip-top shape and use it for years.