09/27/2017
A note for all my friends who play stringed instruments. Those white (or black, if you prefer that color for your bass bows) filaments on your bow really are horse hair. That hair is a natural substance, and vulnerable to all the elements of nature. The humidity in the air, along with other phenomena, will make the hair stretch. They don't stretch one at a time unfortunately. They all stretch together. Quite a lot in fact. This is a natural and expected condition to occur.
The hair is much like the gasoline in your vehicle. It has a certain life expectancy, depending on how much and how hard you use your bow, and it eventually becomes exhausted. So just as you have to replace the gas in your car, you have to replace the hair on your bow. Notice, you replace the hair. You DO NOT alter the bow in any fashion in order to "fix" the stretched out hair. The hair is ON the bow, not part of it. Just as gas is in your car, and not part of it.
I have seen people invent some pretty drastic solutions that ruined the bow, or very nearly ruined it. If you have tightened the hair as far as the button will turn, and the hair is still loose, then stop trying to tighten any further, because you can break the bottom end of the bow, which I have seen, or damage to eyelet under the frog, also seen. There are two solutions. First, if the hair is new, the hank can be shortened. Second, we can put a fresh hank of hair on the bow.
Please don't take a pocket knife to your bow. Replacing the hair is relatively simple, albeit tedious. Repairs to your bow are complicated, expensive, and rarely bring the bow back to its original condition.