Hose is inexpensive and easy to replace. You just have to take off the plastic plenum screen - remove some of the rubber hood seals (They just slip off - not glued.), a handful of screws and some tabs - slip it out from under the wiper seal. Pretty easy to figure out.
If the heater control valve leaks it will usually drip out the plenum drain and onto the top of the transmission. You should check it carefully as a leaking heater control valve is common.