Handling and storing a rubber clay bar (assuming it refers to a clay bar used for car washing) requires careful attention to ensure effectiveness and longevity:

Handling:
Preparation:

Before use, ensure the vehicle's paint surface is clean and free of loose dirt or debris.
Lubrication:

Use a suitable lubricant or detailing spray to wet the surface where you'll be using the clay bar. This helps reduce friction and prevents marring the paint.
Clay Bar Use:

Break off a small piece of the clay bar and knead it until soft and pliable.
Gently rub the clay bar over the lubricated surface using light pressure. Move in straight lines or small circles to effectively lift contaminants.
Monitor Contaminant Transfer:

Periodically check the clay bar for accumulated contaminants. Fold and reshape the clay bar to expose a clean surface.
Rinse and Dry:

After use, rinse the vehicle's surface to remove any remaining clay residue and lubricant.
Dry the surface thoroughly with a microfiber towel to prevent water spots.
Storage:
Clean and Dry:

After each use, thoroughly clean the clay bar by kneading and folding it to remove contaminants.
Rinse with clean water and allow it to air dry completely.
Storage Container:

Store the clay bar in its original packaging or a clean, airtight container to prevent dust or dirt from settling on the surface.
Avoid Extreme Temperatures:

Store the clay bar in a cool, dry place away from direct sunlight and extreme temperatures. Heat can soften the clay, making it less effective, while cold temperatures can harden it.
Avoid Contamination:

Keep the clay bar away from other chemicals or abrasive materials that could affect its performance.
Replace When Necessary:

Monitor the condition of the clay bar. Replace it if it becomes heavily soiled or if it starts to harden and lose its pliability, as this can reduce its effectiveness and potentially scratch the paint.
By following these handling and storage tips, you can prolong the life of your rubber clay bar and maintain its effectiveness in removing contaminants from your vehicle's paint surface without causing damage. Always refer to specific manufacturer instructions for any additional recommendations tailored to the product you are using.