Question: how to upkeep blonde hair?
Answer: Wash your hair less. Essentially washing your hair is what causes colour to fade the most, so get to grips with dry shampoo. ... 
Use a blonde formula. ... 
Choose colour-safe shampoo. ... 
End with a cool rinse. ... 
Try a purple toner for brassiness. ... 
Counteract chlorine with ketchup. ... 
Wash your hair with beer. ... 
Reflect the light with shine spray.