Every component of the automobile has a definitive life span and so do car rear wiper blades. Prolonged exposure to the sunlight can accelerate the deterioration process. Moreover, heavy use of the wiper blades can wear down the rubber before time. Elements like dust, grime, insects, and other abrasive materials are detrimental to the wiper blades as well. On the other hand, high temperatures can structurally weaken the wiper blades in India especially during summers. You should not think that windscreen wipers for my car will hold out against all these problems after 6 months.