Aldanilanswered grow question 6 years ago Temperature is too high, both for day a night. Consequently humidity is rather on the low side. Do you know the relationship between temperature and relative humidity? If not, I'd recommend you read about that.
Try to push down the temperature both for day and night about 5°C-6°C. If you can't then at least try to raise the humidity to at least 55%-60%. The younger your girls are, the more humidity they require.
Also it would help if you post pictures under a more natural kind of light.
Hope it helps.