Maintaining five sets of combination patio garden leisure small coffee table furniture requires regular care and attention to ensure their longevity and optimal condition. Here are some tips to help you maintain this type of furniture:

1. Regular Cleaning: Clean the furniture regularly to remove dirt, dust, and debris that may accumulate on the surfaces. Use a soft brush or cloth to gently scrub the furniture, and a mild detergent or soapy water solution to clean any stains. Rinse thoroughly and allow the furniture to dry completely before using or covering it.

2. Protect from Harsh Weather: Patio furniture is exposed to various weather conditions, so it's important to protect it from extreme heat, direct sunlight, rain, and snow. Consider using furniture covers or storing the furniture indoors during harsh weather conditions to prevent damage or fading.
   

3. Check for Damage: Regularly inspect the furniture for any signs of damage, such as cracks, splits, or loose parts. Repair or replace damaged components to maintain the structural integrity of the furniture. Additionally, ensure that all connections and joints are secure and tighten any loose screws or bolts.

4. Prevent Rust and Corrosion: If your patio furniture has metal parts, protect them from rust and corrosion. Apply a layer of protective wax or a rust-resistant coating to the metal surfaces. Wipe off any excess moisture after rainfall to prevent water from accumulating and causing rust.

5. Cushion Care: If your patio furniture includes cushions, clean them regularly according to the manufacturer's instructions. Remove and wash the cushion covers or use upholstery cleaner to spot clean any stains. Ensure that the cushions are completely dry before placing them back on the furniture to prevent mold or mildew growth.

6. Avoid Weight Overload: Do not exceed the weight capacity of the furniture. Overloading the furniture can cause structural damage or breakage. Consider distributing weight evenly and avoid placing heavy objects on delicate surfaces.

7. Store Properly: If you plan to store the furniture during the offseason or extended periods of non-use, clean it thoroughly and dry it completely before storing. Disassemble any removable parts, such as cushions or glass tops, and store them in a clean, dry, and ventilated space. Use furniture covers or protective storage bags to keep the furniture free from dust and pests.