Now, if you've been at the game for a while, you may know this Crafty Rope Trick (CRT). But it seems to be new to a lot of folks, so it's worth a mention.
When you're tying off a runner or a cordelette for a statically equalized anchor, that master point knot can be very difficult to untie, especially if you’re using skinny webbing, or it gets wet, or if it takes a big load, or all of the above.
To make untying it a lot easier, clip a carabiner in the master point knot after you tie it, and before it’s loaded.
Important: This carabiner is not load bearing at all, and you should not clip anything to it. It’s only purpose is to make untying the knot easier when you break down your anchor.
Try to use a notchless / keylock carabiner with a small nose on it so you can easily unclip it from the loaded knot. In the photo below the carabiner is a locker, but it doesn’t have to be.
The black locking carabiner inside the master point knot will make untying the sling a lot easier.