Last year I made the huge mistake of leaning my bike up against my new curtains lovingly sewed by my mother. (It may or may not have been after a night of drinking. No, I did not ride home that night.) In the morning, I realized I had gotten some grease on them, and there was no way she wouldn't notice the intermittend black spots. I washed the curtain after soaking the grease spots with detergent, and to my horror, not only did the curtains shrink by 10", the detergent lightened all the areas where the grease was. Fortunately my mom had extra fabric and sewed me another curtain.
To prevent the same thing from happening again -- because, let's face it, sometimes you arrive home from work and have to pee SO BADLY that you forget about the chain/curtain problem and just leave your bike wherever -- I started putting plastic grocery bags over the chain. Unfortunately, they picked up a lot of the grease and were a total PITA to arrange.
Has anyone ever used one of these chain cover/johnnys before? From what I've read, the latter used to be known as something else, but if I type it out it may trigger some red flags on my work's interwebz.
I'm pretty handy, so I'm wondering if there's a cheaper, homemade alternative to this. Like I said, the grocery bags kind of work, but they get messy, especially when I'm trying to cover up the gears.