If you are using a dark, nonstick pan, lower the oven temperature to 325F (162C). Pulse the Oreo cookies in the food processor until you get fine crumbs first. Add the melted butter and blend again until smooth. The cookies need to be finely ground, sort of like coffee grounds. If they are too chunky, your crust won't hold together well. Save the remaining 10 cookies for the filling. Make sure that the crust is firmly packed into the pan, or it won't hold together. For a fancier touch, spread the mixture across the bottom of the pan first, then push it 2 inches (5.08 centimeters) up the sides. Do not remove the crust from the springform pan yet. It won't hold together until you add the cheesecake filling. You can do this using an electric mixer or a food processor fitted with whisks. From time to time, pause the mixer, and scrape down the sides with a spatula; this will ensure that everything gets evenly mixed together. Mix the filling on low speed after each egg you add until it is blended before adding the next egg. Make sure that the ingredients are evenly mixed throughout. There should be no streaks and swirls; everything should be consistent. Use a knife to chop the cookies into coarse crumbs; they can be as big or as small as you'd like. Gently stir them into the filling using a spatula. If you need to, use a spatula to help guide the filling into the crust. Smooth the top down with a spatula so that there aren't any ripples. There is enough cake to cut 16 slices. Cover and store any leftovers in the fridge for up to 3 days.To learn how to decorate your cake, click here.
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One-sentence summary -- Preheat the oven to 350F (177C). Mix together the 26 crushed Oreo cookies and melted butter in a food processor. Press the cookie mixture into the prepared springform pan. Bake the crust for 8 to 10 minutes in the oven, then set it aside to cool. Beat the of cream cheese and sugar until blended. Slowly add the eggs, one at a time. Fold in the sour cream and vanilla extract, and mix again. Roughly chop up the remaining Oreo cookies and stir them into the filling. Pour the filling into the crust. Decorate the cake, if desired, and refrigerate it for at least 4 hours before serving.

Viscose is a fairly fragile fiber and also one that is very vulnerable to bleeding dye. Because of this, it's easy to damage viscose rugs or cause them to bleed by simply trying to clean them. If your viscose rug has sentimental value, it may be a better idea to have the rug professionally dry-cleaned than to risk irreversible damage or dye-bleeding by cleaning it yourself. The goal of cleaning a viscose rug is essentially to get the rug as clean as possible while keeping it as dry as possible. Thus, before using any liquid detergents, it's a wise idea to try to clean your rug with methods that don't require getting it wet before trying to clean it with methods that do. Take your rug outside and shake it firmly to remove any loose dirt or dust. You may also try beating the rug against a railing or pole for added power. Next, use a vacuum to remove any ground-in dirt or sediment. Run the vacuum head over the rug several times both with and against the grain, paying extra attention to any extra-dirty spots. If you can, use a head attachment that doesn't have mechanical brushes. Viscose is fairly fragile and the rough action of mechanical brushes can easily cause it to tear. If your rug is still dirty, you may need to carefully wash it. Place the rug on a mounting board or secure it to a table you don't mind getting dirty before cleaning. Washing viscose carpeting requires some scrubbing, so you won't want the carpet to slip around on the floor while you scrub it and you definitely don't want it to bleed dye into the floor or any nearby carpeting. Heat water to a lukewarm temperature and combine with a few drops of soap or carpet detergent to create a cleaning solution. Use a soft-bristled brush (like a window-washing brush) to scrub this solution into problem areas of the rug. Avoid hard-bristled brushes or mechanical brushes, as these can easily tear the fragile viscose fibers. Be conservative with your cleaning fluid - the less moisture you use, the lower the chance of dye bleeding. It's wise to test your cleaning solution on a small portion of the rug that won't be seen before cleaning the whole thing. This way, you'll know immediately whether your solution causes dye bleeding or other distress to the fabric before proceeding. Cellulose fibers (including viscose) turn yellow when wet. To help minimize this unsightly yellowing, lightly rinse the wet portions of the rug with a mixture of vinegar and water. The acetic acid in the vinegar helps prevent yellowing as the rug dries, though it may not eliminate yellowing entirely. To remove as much moisture as possible from your rug, vacuum a second time after you've finished using your liquid cleaners. Pay special attention to any wet areas. As directed above, you'll want to avoid using head attachments that have mechanical brushes to prevent damage to the rug. Viscose fibers can stiffen as they dry, creating clumped, splotchy sections on your rug. To help prevent this, you may want to mist the rug ever-so-delicately with a mixture of fabric softener and water using a spray bottle. This can prevent the fibers from stiffening and lessens or eliminates the dreaded "clumps". You may still find that you need to break up clumps after the rug dries. Do so gently, by hand. Allowing your rug to dry face-down lessens the yellowing effect that can occur as viscose dries. Place your viscose rug in a clean, dry place or hang it horizontally as it dries. However, note that this will make the underside of the rug yellow more than normal. As mentioned above, viscose is notorious for bleeding dye when wet. Thus, you'll want to keep your rug far away from any light-colored fabrics (especially expensive carpeting) while you're waiting for it to dry. Dye stains can be very tricky to remove from carpeting and the bleeding of dye from the rug itself is virtually irreversible.
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One-sentence summary --
Have the rug dry cleaned if it is very important to you. Shake your rug outside. Vacuum the rug. Ensure the rug won't move while you're scrubbing it. Use a soft brush to gently scrub with soap and water. Wash with vinegar to minimize yellowing. Vacuum again. Optionally, spritz the rug with dilute fabric softener. Dry face-down. Don't place the rug on or near any carpeting until it is completely dry.