Making water drip off a house roof

I’m trying to add a fluid sim that drips off of a house and rolls over the windows. I understand domain and inflow, but I can’t reduce the scale of the fluid. I’ve increased and decreased the real world size, but it maxes out at 10 meters. It looks as if the house has giant jello dripping on it. What settings should I change? Also is this the best way to have rain realistically drip off of a roof?

Don’t use the fluid sim. Use particles instead, the fluid sim isn’t capable of work that detailed.