Because the summer is not nearly over yet and because it can never hurt:
Do not
1. Park under trees
2. Leave in the sun
3. Clean with a high-pressure cleaner or in a car wash
4. Open or close the roof while driving
5. Roof down in cold weather
Do well
1. Parking in carport or garage
2. Pre-clean with vacuum cleaner
3. Clean with lukewarm water and green soap
4. Check hydraulic fluid
5. Close the roof when parking