2009 Toyota Corolla purchased just 1 year ago and has just over 21,000 miles. I had to have the brakes replaced at 10,000 miles, again at 18,000 and now with just 2000 miles on the latest set of brakes, they are squealing. I don't believe the problem is my driving, have been driving for 20 years without any problems like this until this particular car. What could be causing this?