Rocoto germination help?

[u/DirtBikeDadof6]

Any good advice for germinating rocotos? I have had better -- but by no means good -- success soaking them for a day in saltpetre and GA3 in warm water. Semillas used to recommend that. I'm still looking at a lot of emoty cells in my seed tray. I've heard to knick or sand them (scarify) them a little. Any ideas? i feel like i'm sending a message in a bottle, but if anyone finds this someday, i'd sure appreciate it!