Some car consumables deteriorate gradually, making the decline easy to ignore. Check these items by condition and service interval instead of waiting for a failure.
Wiper blades
Streaks, chatter and missed areas reduce visibility when you need it most. If cleaning the windshield does not help, worn blades are likely due for replacement.
Cabin air filter
A clogged cabin filter restricts airflow and may worsen fogging. Replacement intervals depend on driving conditions and can be shorter in dusty areas.
Brake fluid
Brake fluid absorbs moisture over time, so the reservoir level is not the whole story. Follow the service schedule for your specific vehicle.
Coolant
Old or incompatible coolant can reduce corrosion and temperature protection. Do not mix coolant types unless compatibility is confirmed.
Tires
Tread depth is not the only factor. Cracks, age, pressure and uneven wear also matter, especially before a long trip.
Bottom line
Keep the solution simple: start with the most likely cause, change one factor at a time, and observe the result. That makes it much easier to identify what actually works in your situation.