Send teams of miners into the cave! You start with one miner. Occasionally, the stalactites in Iffy cave will fall, bringing a mild setback to your mining by, well, hurting miners that it hits. Hiring price increases with quantity of miners.
If you use turbo mode to speed it up, the ores may stop spawning. Wait 15 seconds and you'll be good. SDS for convincing me to finally share it