Have you tried the Nexxus Botanoil Treatment shampoo? That's my staple shampoo. My hair always feels clean, but never stripped. Lots of good ingredients. I by the 1 liter bottle for around $19. The refill pack is $15.
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Botanoil Treatment Shampoo
Treatment for Stressed or Chemically Processed Hair Strengthens, improves elasticity, pliability; replenishes essential fatty acids. For tinted, bleached, permed and relaxed hair
Replenishes essential fatty acids and nutrients
Increases strength and elasticity
Protects hair from the damaging rays of the sun
Conditions the scalp with essential fatty acids
Fortified with lecithin and aloe vera
pH balanced Botanoil Treatment Shampoo is an unusually rich, custom designed shampoo that produces dramatic results on chemically processed hair. Botanoil infuses essential fatty acids derived from natural botanic oils to replace valuable lipids lost during chemical services. Elastins and the hair's own amino acids, cysteine and cystine, restore strength, suppleness and elasticity to chemically damaged hair.
These natural emollients are necessary for the hair to remain soft and pliable with a healthy, radiant sheen.