Liquid soap helps with tightening wood screws, use soap for speedier wood screws placed in wood.
Use Soap for Speedier Wood Screws
If you are experiencing difficulties with tightening wood screws, soap is a great helper. I used to carry a bar of hotel soap in my tool kit, but now I use liquid soap, as it is quicker to apply. Just slather some on the threads or squirt a little in the hole and you will find the screwing process takes half the torque. Oil would also work, but would be likely to leave a stain on the wood.