Are you using the Blue colored AirStream app? it has a setting area in it that will show the most used channels by way of the most green bar next to it, the less green channels means they are less busy and should perform better.
For those who have the Blue colored AirStream app or a similar application, checking the channel utilization and choosing less congested channels can indeed help improve the overall stability and performance of the Wi-Fi connection. This is especially relevant in environments where multiple Wi-Fi networks may be operating in close proximity.