I got really tired of my windows rolling down about 1 out of 3 times that I tried to roll them down. It seems that all the spilled cokes and coffee really jammed up the window cluster. So I called a few junkyards and found a window cluster for my 94 530i. With another cluster in mind I removed my own and let hot water run all through the cluster. Then I used alcohol and q-tips to do the fine detail cleaning. I let the cluster sit in the sun all day to dry and plugged it in just to see if I had fried the cluster. Well, to my suprise it works perfect. Now my windows go up and down every time. I guess I won't need the other cluster after all