Suspension Awakening

[JThiessen]

My revo is probably about 4 years old now. Its been beat, and misused over and over again (it's official name is "OutKast"). My suspension is showing the signs of being old. When I push the rear down, it just stays down. I've rebuilt the shocks (40WT), I've changed springs several times (I threw some purples in the rear last night...holy rebound!!!). When it was newer, the Revo's suspension was so soft and smooth. I'd like to bring it back to that. Is this a case where I need to go through and replace all the bearings/pivots? Or should cleaning and lubing do the trick?