I think you`re shampooing too often --this might `surprise` you ..... I`d also ease back with the ` Enhance`..... whilst it normally won`t ` build-up` on the hair like Gels and other products can,if you`re applying it heavily and frequently, like most products, you can begin to see a lifeless look to the hair..this then leads you to shampooing, which can have a drying effect and also can lift / lighten the colour..... and so the cycle begins !
Your system-hair is not ` dirty` or oily as growing-hair can get, and unless you work in a dusty atmosphere, your hair will be fine from day to day, so there is no need to shampoo it frequently. I don`t know the ingredients in the Dove conditioner but it`s probably ok....what you need to keep an eye open for in any products are Alcohols with the name ` Alcohol denat` [denatured alcohol] --not all ` Alcohols` are harmful to system-hair, but those ones are.
Obviously, over time, as any hair ages, it will naturally begin to deteriorate...your care-routine in the early days will pay dividends in terms of wearable -life of your system.
I generally mist the hair daily [ often a few times] ... when applying your ` Enhance` ----- spritz the hair with water so it`s pretty damp..then back-brush it so the hair is standing `up` from the lace....then just spray 2 or 3 darts from a distance [not too close] so as to get an ` even` light coverage ...style your hair and allow to dry naturally....you can often reinvigorate this the next day by simply spritzing with more water ..... so, just try to tweak your care routine a little as I have suggested and you should see a difference ...regards.
p.s. I understand you may want, for hygiene reasons to clean your lace base --that`s good...you can wet your base [off your head] smear on some shampoo and rinse it off again...yes, some will get onto the hair, but only minimally .