Losing a Set

On a flight to Tokyo I lose my washbag which contains aligner set 16. Dr H had said this usually is not too much of a problem because you can move onto the next set. It was a bit of a close shave because I nearly put sets 16 & 17 in the washbag, and losing both would have been a disaster. Set 17 is really hard to wear, so I alternate 17 at night, 15 during the day for about a week.