MDM Trouble Report for 2017 Dec 08 Telescope: 2.4m Observer(s): Rupert (MDM) Instrument: OSMOS/R Problem(s) Encountered: Had to run the snapclean script in Prospero to eliminate the icicles after saturating the camera during sky flats. It took a multiple frames for it took take full effect. This happened periodically throughout the night, even when no saturation occurred. While taking morning twilight flats I realized that doing so with the 4x1k seemed to draw out the icicles even if the rest of the chip was unsaturated. Repeating the same frames with the whole 4K array yielded no icicles. ------------------------------ Submitted on 2017 Dec 9 [7:17:08]