I've been using silicone spray since putting a new chain on this spring and giving everything else a thorough cleaning, but just last night, I noticed some metal filings on one of my pulley's that caused me some concern. It had to have come from the chain, but I've not had a chance to investigate yet. I last wiped and sprayed the chain about a week ago (maybe 80 miles), and we did get caught in a brief shower one morning, so I'm wondering if I need to be a little more diligent about re-lubing when using the silicone versus the White Lightning I used before.

Any thoughts?