I've definitely had days when my lashes seemed determined not to cooperate, and the weather was often to blame! Temperature and humidity play a huge role in eyelash glue performance. In warmer and more humid conditions, the glue tends to dry faster, which can be tricky if you're not quick enough with application. I learned this the hard way on a summer day when my glue dried nearly instantly, leaving me with misaligned lashes. Conversely, in cold or dry environments, drying times can double, requiring more patience. Ideally, working in a room with moderate humidity between 50% to 60% and temperatures around room temp (about 20°C to 22°C or 68°F to 72°F) can create the perfect balance for most glues. If you're curious about this, this site offers some good insights. Anyway, remember that if you're struggling, a small humidifier or fan can help adjust the environment to be more lash-friendly.