1. Loosen the bow hair. Use the screw at the frog (the part of the bow that you hold) to loosen the hair until it is about 1/4 inch (6 mm) from the stick.
2. Clean the bow hair. Wipe the hair with a clean, dry cloth to remove any dirt or rosin buildup.
3. Apply the rosin. Hold the rosin block in one hand and the bow in the other hand. Draw the bow hair across the rosin block, moving from the frog to the tip. Apply enough rosin so that the hair is evenly coated.
4. Tighten the bow hair. Use the screw at the frog to tighten the hair until it is snug against the stick.
5. Play the cello. Test the bow by playing a few notes. The rosin should help to create a smooth, even sound.
Here are some tips for applying rosin:
* Use a light touch when applying rosin. Too much rosin can make the bow hair sticky and difficult to play.
* Apply the rosin evenly to the bow hair. If the rosin is applied unevenly, the bow will sound scratchy.
* Re-apply rosin as needed. The rosin will wear off over time, so you will need to re-apply it periodically.
With a little practice, you will be able to rosin your cello bow like a pro!