This may sound like a dumb question -- I know how to oil a bike chain, but apparently not how to do it correctly.
I have a relatively new gravel bike, a Giant Revolt, which I ride (on tarmac) about 25 km a day and whose chain I've been oiling regularly, about every 2-3 days, just as I'd done with my previous bike, a mountain bike. I took my gravel bike in for maintenance and they said I was overdoing the oil, that in fact it was better too dry than too wet. What they said I should do is -- after every ride -- clean the chain with a towel and then oil it "lightly". What's "lightly"? "One drop" they said. For the entire chain? I doubt it -- but I'm not sure what they meant exactly. (I should have asked when I was there, but now, given Covid, it's very hard to get in touch with them again -- we have to make scheduled appointments to see them).
I'm looking for 'easy daily' maintenance -- not 'thorough' chain cleaning, as I've read about in other posts. Just enough to keep things clean and well-oiled, that is, getting the chain clean with a towel and then lubricating it again. I guess the crucial question is "how much oil?"
Again, in some ways this is a very simple question, but the devil lies in the details, and that's what I'm not clear about.