Macbook + mighty mouse not auto connecting?

Hi I have a Macbook, an Apple wireless keyboard and Mighty Mouse. I take my Mac home with me on a night, but when I return the next morning the keyboard/mouse has lost connection! I have to reboot OS X..

Its a bit frustrating. Is there anyway around it?

just click on it and will connect it again

More accurately, click it several times. It'll connect. I also thought you had to go through the whole device discovery thing, but found a little later that you don't.

It's nice to have that USB port freed up.

Yes, but what if said devices don't connect even after clicking several times and after several device on-off cycles? The batteries are fine, the mouse is not broken, but very frequently, my mouse will not reconnect to the computer. Sure, I *could* use the trackpad to go to the bluetooth menu and specifically choose "Connect," but I refuse to do so as a matter of principle.