Step 1 Tighten up any screws that may have come loose. Any really loose parts should be reglued and screwed back in place. Lightly sand where glue will be to remove any dirt and improve the bond to the timber. Let glue dry.
Step 2 Mix 1 part deck cleaner with 4 parts water in bucket. Wearing gloves, scrub furniture using scrubbing brush to bring timber back to its original colour. Leave to sit for 20 minutes, then rinse off. Leave to dry completely.
Step 3 Apply 2 coats of outdoor furniture oil, allowing to dry between coats. For the best long-term results, you should re-coat timber every 6 to 12 months to keep it looking great.