Mighty Mouse tracking performance getting worse

Has anyone noticed that the tracking performance of the MM deteriorates over time ? I have tried to investigated what could be the cause and I am not sure if it's connected to other bluetooth devices in the vacinity or if it's connected in some way to what apps are loaded on the MAC, or is it both ? there seems to be considerable communication in this forum that suggests that the hardware is suspect ..... is this another problem...
John

Have you tried putting in new batteries?
I wrote up a few things to try and then I came across some steps from apple:
7) Check for a Bluetooth Update
To check for new software, choose Software Update from the Apple menu (make sure that your computer is connected to the Internet). If newer Apple Bluetooth software exists, Software Update will find it. To install an update, select the checkbox next to the software name and then click Install.
8) Check for Signal Spoilers
Because Bluetooth works by transmitting signals through the air, some things can interfere with connections. Avoid situations in which metal objects come between your device and computer. Don't put your computer under a metal desk or locked away behind a metal cabinet. Keep cordless phone base stations, microwave ovens, and other electrical devices that operate on a 2.4 GHz bandwidth away. And make sure that your device and computer aren't more than 30 feet apart from each other.
9) Restart Your Computer
Sometimes a simple restart—or two—is all it takes to get things running smoothly again. Try restarting your computer to see if that clears up the issue. If not, try shutting down your computer, waiting a minute, and then starting it back up again. You may also want to try resetting your computer's PRAM and NVRAM.
10) Reset Your Bluetooth Device
First try turning your device off and then on again. If that doesn't work, see if you can reset your device—please refer to the documentation that came with your device for instructions.
These are from http://docs.info.apple.com/article.html?artnum=303591

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