I flew LAX-MUC last week in C and the temperature was set-up at 25 degrees celsius!
Obviously most of the people had problems sleeping and were throwing their blankets on the floor or not using them. I asked the purser to lower the temperature, he did it... to 24 degrees celsius after several requests from me and some other pax!!!
Once they served the breakfast then they lowered the temperature to cool.

I just want to know if you also find like me that on most of the day flights the cabin temperature is too cool and night flights too warm.