So disappointing! I haven't worked with Ruby, so I don't know if it acts any differently from 'regular' chocolate. Was it a blend of Ruby and white? For me, 72F is bordering on too warm, I prefer my kitchen (and my molds) around 65F.
To clean your molds, put them in the freezer for 15+ minutes to force the remaining chocolate to contract then bang it out and wash the molds as usual.