I took my Trail Edition into the dealer yesterday because both headlights have developed this slightly cloudy/oily film inside them on the upper surface which wasn't there before. If you look at it quickly it looks like condensation but it is not, its more likely to be gases being released from the plastic in the assembly due to the heat. There was one other Trail Edition in the showroom at the time and it also had the same problem developing and the Service Manager said that it is definitely covered in the warranty and that they will change them out but first they are getting in touch with headquarters about it because he received a memo about a possible manufacturing defect with the subcontractor who builds them for toyota and just switching them out might have the same problem again...anyone else notice this on their 5th gen trails? its barely noticeable and its cosmetic but its covered under warranty and I can only imagine it getting worse in the years to come...