Well, whether you are using a bamboo pillow or about to use a new one. You must know how often you should change a bamboo pillow. As per the National Sleep Foundation, change pillows after every 2 years. The same goes with the bamboo pillows also. No doubt it may last longer like 4 or 5 years easily but it will be good if you replace it after a couple of years. Pillows are one of the few things...