Keeping it spotless is easy. Just empty the area you wish to clean, air-lock a few bulkheads and then just open the area to space. Anything which isn't nailed down will be sucked away into the lovely vacuum of space. Then just re pressurise and reopen.
But it is spotlessly clean, which can be considered odd considering it was a refinery and they're considered generally dirty.
But it is spotlessly clean, which can be considered odd considering it was a refinery and they're considered generally dirty.