Skip the power-washing Rx because this is inside the garage and I don't want to get everything wet. What products might work to clean this 35-year old floor that has embedded pet residues, oil drops from my Model T, paint, and who knows what else deposited and diffused into the concrete? Detergents have had a scant effect. How about a lye solution? TSP? A muriatic acid wash seems a little drastic, but how about that none the less? The floor is in great shape with a smoothly troweled surface and no cracks.

We had one of our 40" torsion spring break on our garage door in our new house. I was able to determine what size spring had been used there and to purchase a new one. We have an 8' by 19' for that is quite heavy. I was not able to lift the door at all when there was no tension in the springs. I initially would each of the new springs 30 quarter turns as was suggested in numbers articles and videos. The door still did not move at this amount. I tried a few more turns and didn't have much success. I did a little bit more research and found someone saying that 8' does required and additional four quarter turns more to account for the additional for height. I ended up adding 2 more quarter turns and now the garage door is working. It does make some creaking noise for the first 6"if lift which disturbs me some. Is this normal? Is there a way to verify that these springs are appropriate for this size/weight of door? I'm not 100% sure the previous installer used the correct size springs.