Yeah. I've thought about this too. I would think the amount is negligible? Once a week, as the Solo is cooling down, I'll swab it with a q-tip and some iso while holding it upside down. I used to do this with the AVLP as well.
I would hope that any tiny amounts of condensate that collect up there might be dissolved by swabbing the nooks and crannies around the four air-intakes at the bottom of the oven. I've tried to keep mine looking spotless. The Solo has really no other maintenance required luckily. Just cleaning the stems.
Edit: Would be interesting to open up the Solo after some use to look inside and check for any resin accumulation anywhere.
Anyone? ... Anyone?... Buehler?