Hi,
I have been CO washing on and off for a couple of years, however I have destroyed my hair by using semi permanent hair dye 
and now am faced with a hideous, bushy, crispy mess. My hairdresser was horrified the last time I went 
My hair is wavy and has a great deal of canopy frizz / bushiness, but is actually quite fine underneath.
Today I started using Naked shampoo and conditioner - the conditioner is great, but the shampoo left my hair matted, dry and unpleasant.
The problem I have with CO washing is that my hair does become gungey and clogged after a while - I don't really get why, as I CO washed happily for about 10 months, then it all went wrong (after becoming pregnant with DS3 - dunno if there's a link there?) DS3 is now 17 months so I can't really blame this on pregnancy or baby stuff!!!
I am very particular about rinsing and massaging scalp with finger pads when CO washing, and make sure it's rinsed properly, and then some for good measure.
The best conditioner I use is Body Shop Banana (not the shampoo though as it has SLS and parabens) but it does go gungey after a short time.
So, I am searching for a "clean" CO friendly conditioner - and it isn't working anymore. I need to use Cone free, Paraben free (this does make a noticeable difference) and also SLS free products.
I do not use any styling products really, as they crispify my hair noticeably.
These are some of the products I've used - verdicts below
Sainsbury's own brand Apple Conditioner - I was great with this for months, then suddenly it stopped working (thought perhaps pregnancy is an issue here?)
Tresemme Naturals Conditioner - great at first, but hair became really unpleasant and dull after a while
Body Shop Banana Conditioner - this is my CO of choice, but even this becomes clogged and gungey after a while.
Body Shop Rainforest - OK for a few CO "washes" but then went clogged and gungey
Timotei Naturals Conditioner - a good "clean" conditioner, but not enough conditioning for my now matted crisp hair 
Pantene Natural (or summat) shampoo and conditioner - the shampoo has SLS, but it stripped my hair horribly.
Timotei Organic Delight Shampoo and Conditioner - literally The Worst Shampoo I have ever used so much so that I complained to Boots. It took 2 weeks intensive argan oil (pure, organic, not Moroccan Oil type silicone stuff) to get my hair back to a decent state.
Have also done pure organic coconut oil treatments, and didn't really get on with it.
I can accept that I need to use shampoo occasionally to refresh my hair, but ideally I'd like a SLS free one which does actually moisturise my hair, and not make my frizz worse.
My hair was lovely and swishy finally, after years of fuzz and crisp. And then I dyed it cos of a few grey hairs. It is awful now WTF!!!!