Write an article based on this "Open the blinds. Remove the blind attached to the carrier stem. Grab the carrier body with needle nose pliers. Twist off the stem. Get a replacement stem. Insert the new stem."
If you need to replace the stem, the first thing you should do is open the blinds. You can't replace the stem if your blinds are closed. Unhook your blind from the problem stem. If you have a spacer chain, remove the blind from the spacer chain as well. The carrier stem is a small rectangle shaped piece of plastic clamped around the top of the blind. The stem is attached to the poll by a small piece of plastic found on the poll just to the right of the stem. This is known as the carrier body. Clamp a pair of pliers around the carrier body. Get as close as you can to the body without touching the stem. The poll the blades are attached to is hollow inside. The carrier body found inside the poll, pressed against the right side. Use your free hand to gently twist the stem away from the carrier body, holding the body still with your pliers. As you twist, pull the stem downward until it detaches from the carrier body. It's important you get the exact right match for your old carrier stem. A different stem will not attach properly to your blinds. Either order a stem from the same manufacturer online or take your stem to a hardware store and find an exact match there. You can ask a worker at a hardware store to help you identify the correct stem if you're confused. Inserting the stem is a lot easier than removing it. The stem should have a knob that fits into a hole in the carrier body. Simply push the stem into the carrier body until it slides into the hole. You can then push your blade back through the stem. Once the stem is replaced, you can reattach the blind and spacer chain.