I purchased 4 pololu IR sensors of model mentioned above from the local distributor that you have used in Sri Lanka today. 3 of the sensors are working and giving an accurate reading when implemented with an arduino using the library that you have referenced. However, the fourth module does not return accurate readings. I contacted robo.lk ([http://robo.lk]) who is the authorized distributor for Pololu in sri lanka and they mentioned that Pololu does not replace parts which have been opened or used. I soldered a capacitor between the power and the ground pins as instructed by you in the details for the usage of the module. Am I eligible for a replacement ? If so would I be able to get the replacement from robo.lk or will I have to wait for it to be shipped by you? I need the sensors urgently for a robot competition and would appreciate it if you would look into this matter with haste.