Here are some tips for maintaining a half-fold open umbrella:

Keep the umbrella clean: Use a soft cloth or sponge to clean the umbrella regularly, especially if it has been exposed to dirt, dust, or other elements.

Store the umbrella properly: Always store the umbrella in a dry place, away from direct sunlight or heat. When the umbrella is not in use, make sure it is completely dry before folding and storing it in its sleeve or cover.

Avoid strong winds: Do not use the umbrella in very strong winds as it can damage the frame and fabric. If you are caught in a strong wind, make sure to close the umbrella and hold it firmly until the wind subsides.

Don't force the umbrella: Do not force the umbrella open or closed as it can cause damage to the frame and fabric. Use the opening and closing mechanism gently and carefully.

Repair or replace damaged parts: If any part of the umbrella gets damaged, such as the frame, fabric or the handle, get it repaired or replace it to ensure the umbrella remains in good condition and functions properly.

By following these maintenance tips, you can ensure that your half-fold open umbrella lasts longer and performs well in various weather conditions.