With the cold of winter and the fluctuations of the temperatures, moisture will show up for sure and try to corrode and rust metal and aluminum parts. It more of a preventative thing to keep moisture away in an unheated garage. My old bike I miss part of the rotor with the WD40 and found rust in the spring and so I got the heat bar under it every year and never had a problem after that. So I have just continued the practice with the B.