I agree....the less often you wash the hair the longer it will last.

But the thing is, you have to at least shampoo the base when you remove. So even if you don't wash the hair itself, you are still washing the knots.

For me, I use styling product and pretty much have to wash twice a week. I suppose I could stretch it by only washing the hair every other time I remove, but I don't think I could get the hair to play nice if I did.

About the sun doing damage.....I have to caution not to underestimate the effects of UV rays. My very first piece started turning orange after only 2-3 hours in the sun.