Ask yourself "How were my wiper blades working when it last rained". If you were not happy with your answer, you should have them inspected at your local Take 5 Oil Change located on 355 Bayly St. West and possibly replaced.
Most newer vehicles are equipped with a beam (high performance) blade due to the many advancements in wiper blades. These blades provide a significant advantage to traditional blades to provide the ultimate vision possible. They also give a better cleaning experience by utilizing infinite pressure points, less wind lift, and a lower visible profile. The concealed parts also safeguard the blade from damages of snow and rain. Plus these blades can be retrofitted for older vehicles giving everyone the safety they deserve.
How were my wiper blades working when it last rained? If you are not happy with your answer, you should have them inspected and possibly replaced. Since wiper blades are not used every day and are exposed to various weather conditions there is not a precise mileage or time interval for when to replace them.