In my opinion, this is not worth the trouble of pulling a line, which might even cause a leak.
If you do want to help, buy a cheap turkey baster. Use this to suck all the fluid you can from the resevior. And refill. This will probably change out 50%, or more, of the fluid. This eliminates the leaks possibility and the possiblity of getting air into the system.
Run it a little, then repeat, several times if you want, to remove even more of the old fluid.