Machine oil everywhere!

You would not believe my afternoon. I was sewing on Boxy Stars because I wanted to get them finished and put aside so that I could finish Burgoyne Surrounded. I had four blocks left to finish (already had the four quadrants finished for each one) and ran out of bobbin thread. Everytime I thread a new bobbin, I oil my machine. Why didn't my knowledge of how plastic breaks down enter my mind? After a good squeeze, machine oil went all over the top of the machine, under the coverplate, soaking the bobbin case. It even went on one of the blocks I was sewing. I hurried to gather paper towels (used about a roll of them) and then for spray cleaner for the top of my machine. The block went into a tub with a very good helping of Dawn dishwashing liquid. After finishing the cleaning of my machine, I rinsed the block. I'm not sure if it shows, but I'll check it before I sew it into a top. A new block may have to take its place, but I do have a well-oiled machine! I don't think I'll have to oil it for a while. I have learned to replace machine oil if it is over ten years old since the plastic does get brittle. How long have you had your machine oil? Just checking to save you some aggravation!