Was told to use a degreaser on the rotor for my rear break to get the squeek to go away? Does not always squeek, but seems like when i am in 2nd going to 1st for a stop at times the rear brake is squeeking. Anyone had this issues and if so what did you do to fix it?

 

When I wash my bike I wash the rotors also with just soapy water and a rag, I never had a squeek.