I've gone a lil over 4 months twice. My secret: wet n wavy hair. I washed it everyday the first time. Washed it every other day and oiled my scalp the second time. I think i could have gone longer the second time. I only took it out for an event. But it was looking fresh as ever even in the fourth month. I even had ppl stopping me in the street, no lie. I had a little piece of hair left out which i kept moist and did braid outs to make it match the wet n wavy hair. I also relaxed that piece in the third month. I never had any knots or tangles and I got lots of growth. Oh yea I used that cheap bss hair too. My advice to any weave wearer be it straight or curly is you need to treat the weave with just as much care as u treat ur real hair.