My Amazon FireTV Remote quit working after not having used the device for a few months. Added new batteries, no change. Took a careful look inside the battery compartment and noticed some corrosion on the bottom contact (I assume from leaving the old batteries in too long?) Took a little steel wool and buffed the contact to get back to bare metal. Re-inserted new batteries and VOILA!, it works. Think I may start using rechargeable batteries in all my remotes to force me to open the compartments to inspect/replace batteries more often.