I used to wash it every day but since I colour my hair fairly regularly now (just a few grays!!) I try to preserve the colour for as long as I can so I wash it every second day. I have tried every shampoo & cond. under the sun but I keep coming back to the PPS green one for fine and dry hair. I don't feel it's too rich at all as it's for frequent use so can't be too heavy. My hair is quite fine and goes oily on the second day. I chopped it all off afer DS was born as it pretty much fell out heaps, but now it's long enough to put into a pony tail so that's great. Someone told me to steer clear of oily hair products if your hair is oily and stick to 'normal' hair stuff. Apparently the oily products sometimes stip off too much oil and then your scalp produces more oil to replace it, and can become even more oiler.