Did you change conditioners? What are you using?
It sounds like you have build up on your hair.. are you sure the conditioner is free of all types of silicones? What about your styling products?
Have you done anything else to your hair?
If you figure out that it's a silicone build up, you'll need to clarify. It might however be that the conditioner you're using is heavy in protein which can make your hair feel dry and frizzy.
Maybe if it's the latter, you can just move to a super moisturizing conditioner.