In one sentence, describe what the following article is about: If you have the assembly guide for your model, it should tell what parts you need. Typically, you will need 6 base boards, 3 slat racks that are strapped together, wood screws, clevis pins, and cotter pins. Find the hinge points of your base boards. These will holes that run through the boards. Place 1 base board on top of another and align the 2 at the hinge points. Then connect the 2 with a clevis pin and a cotter pin, or whatever connection method your model uses. Connect a second base board to the other end of one of these boards. Make sure that the 2 base boards connected to the center board are on the same side of the center board, so that the center board look like it is behind or in front of the other 2. Repeat this process with the other set of 3 boards. Lay the slat racks against your connected base boards. Line up the holes in the slat racks with the holes in the base boards. Place a wood screw through these holes and tighten them with a screw driver. Repeat until the slats are connected to the boards through each hole. The amount of screws you'll need varies, but there are often 12. Lift up the front end and gently slide it forwards until the futon converts into a couch. If it does not work, check to make sure all the hinge points of the base boards are joined together with the connections you need, usually clevis pins and cotter pins. Pull the futon out so that the slats are lying flat. Then lift the mattress and set it down on top of the slats. Now you should be able to enjoy your futon as either a bed or a couch!
Summary: Check to make sure you have all necessary parts. Attach the base boards together. Attach the slat racks to the base boards with wood screws. Check to make sure the futon works. Lay the mattress down on the futon.

In one sentence, describe what the following article is about: Liquid oxygen systems vary widely in design and use. While the general steps are similar, the ways in which you operate the system may vary. Always refer to your manufacturer's guide before filling your tank. Only a professional can replace the tanks on the main filling station. Talk to the provider of your liquid oxygen machine to set up a regular maintenance service. This is the dial on the top of your portable tank. When the dial points to the red area, the tank is nearly empty. It is time to refill it. If there is any moisture or dirt on the machine or tank, use a clean, dry towel or wipe to remove it. Even small particles can interfere with the oxygen. This tank is called the dewar. It is where the liquid oxygen is stored before it is put into portable tanks. For most home tanks, line up the filling connector on the bottom of the portable tank to the port on the top of the machine. Press down until you hear a snap. Other devices may attach to a nozzle that sticks out from the side. In this case, look a port sticking out on the portable tank. Insert the nozzle into this port. Listen for a loud hissing noise as the tank fills up. Pause every 30 seconds to prevent ice crystals from forming in the tank. Liquid oxygen usually only takes a few minutes to refill. The tank is empty when the noise dies down to a soft murmur or a bubbling liquid. When cloudy white vapors emerge from the dewar, snap the plastic switch back into its original position. Remove the tank.
Summary: Read the manufacturer's instructions before operating your system. Fill the tank if the pressure gauge is in the red. Check the system for any dirt or moisture. Attach the portable tank to the main tank. Fill the portable tank by pulling the plastic switch on the side or back. Switch the portable tank off when the tank's pressure reaches full capacity.

In one sentence, describe what the following article is about: Although there are many brands of commercial window cleaner, they tend to include excessive amounts of soap, which will cause streaking. As such, you are better off using either an equal part mixture of vinegar and water or a homemade cleaning solution.
Summary:
Avoid store-bought cleaners.