Hope the following tips are useful.
Please note there is no 100% cure but I find the following steps does help.
1. Try out the new batch for 2 sessions
2. Review the used shuttles and ask the regulars for feedback
3. Determine remedial action required
A. Brittle shuttles
- need to humidify shuttles
- have to experiment exposure time to determine what works for you
- for my current batch of shuttles, I empty the tube and leave the shuttles at normal room
temperature for 30-40min (80% humidity in the country)
B. Softer shuttles
- need to dry shuttles
- leave in air condition or room with heater
- have to experiment exposure time to determine what works for you
- previously empty the tube and left the shuttles in the air condition room overnight
C. Slow shuttles
- need to dry the shuttles
- have to experiment exposure time to determine what works for you
- previously empty the tube and left the shuttles in the air condition room for say 2-3hrs
D. Fast shuttles
- need to humidify the shuttles
- have to experiment exposure time to determine what works for you
- remove the tube covers and left the tube in the fridge for 3-4hrs
E. Do nothing
- this scenario does not occur often