Coolant Smell

A month or so ago, after my wife and I went for an afternoon ride, I noticed a spot on the pavement in the area under the left side of the engine. I took it to a dealership close by, and they said they changed two hoses and o rings that go into the thermostat. Said they had to remove the gas tank and seat, and that was the only area they could find a leak. I have ridden it abot 200 miles since then. It doesn't leak, but I can still get a wiff of coolant. They told me I would probably need to wash the bike to totally get rid of the smell. As I said, it doesn't leak. Should I be concerned about the smell ?