Please follow the product manual. Even better products, do not use for a long time to extend the life of the motor. Usually pay attention to use, can extend product life.
Butter must be softened and cut into smaller pieces. Otherwise hard buttered feet can throw your machine, especially eggs, to destroy it!
When playing flour, use a spiral to beat the egg, but I do not recommend that parents use pray and egg beater to beat the dough. Because the dough is wet and sticky, the egg beater turns up very hard and it can cause friction and heat and the motor is hot. So, if you don't want to ruin a machine because it's baking dough, please use this feature with caution.