There is enough of a leak that you can see the drop every day? How much do you have to add?
When you stop and see the collapsed coolant hose, is the engine running and up to temp?
Have you tried looking after dark using a flashlight and looking for steam?
Any sign of your engine temps higher than usual?
Sherm & Terry w/rescues Steve (std Poodle) & Eydie (min Schnauzer)
2015 Jay Flight 27RLS (Camped: 102 nights 2015, 90 nights 2016)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.