how often you change brake fluids ? Change it as requires, ..also, ..it may be time for you to service the calipers, ..or maybe the brake pads are already due to be replace. Remove and clean all calipers, ...there could some dirt that will cause it to hang up. After a long drive, ..check the wheels if it's hot, ..if it is, ...then your brake is getting stuck and not returning to its normal position. A good caliper job is required...Hope this helps....