Bicycles don't require a ton of regular maintenance. I didn't say they require NO maintenance, just a little bit. If you've been riding through this winter, there are two things you should do.
One- LUBE YOUR CHAIN.
I've gone over this before, but to review:
1. Coat the entire length of the chain with a bicycle-specific chain lube. We're using Pedro's in the shop these days.
2. Back pedal a bit to let the lube work itself into the chain. Or let it sit for a while (15min- 1hr). Or both.
3. Wipe off the extra with a rag.
Two- WIPE DOWN THE FRAME.
Bikes made of all types of materials are subject to corrosion. The chemicals used to treat winter roads speeds up that corrosion. You want to get that stuff off your bike.
A bike specific cleaner would be best- something that's going to be safe on all of the parts of the bike (we use Green Fizz in the shop). If you don't have that handy, a couple drops of mild dish soap in warm water will work. Either way- be careful around brakes and braking surfaces. No bike cleaner, and you don't like soap? At the very least, brush the salt off when it dries with a dry rag.