I just went through that! I thought I needed extra moisture because of the drier winter air, but it turns out I was over-conditioned. (Hair felt fluffier than normal and had a strange texture to it that I thought was dryness. Think cotton candy.)

I did a protein-treatment and my waves perked up! I used Neutral Protein Filler (from Sally's) in a 2 to 1 dilution with distilled water in a spray bottle. I used all 3 oz. and my hair was curling up before my own eyes. Very strange to see. Now I know to lay off the heavy conditioners. HTH!!
CG Journey Start Date: 08.21.12 Now modified CG
F/M texture, Med Density, Low/Normal Porosity, Hennindigo

Current Routine (Still working out the kinks):

Sulfate wash: CHSTS
Low-Poo: OMAO
CO-Wash: IEC, VO5VMT, TNRV
Rinse Out: YTCarrots, DLOO, Renpure Red, GVPCB
LI: YTCarrots, CCC
PT: NPF
Styler: AG:RC, KCCC, LALNC, FSG
Gel: BRHG+Biotera