I kept my nipples covered until the scabbing stopped, and that took about 4-ish weeks. I think it was week 5 when I let water hit my chest directly but I was still careful about it. No hard spray, etc. And afterwards I used alba un-petroleum jelly on my nipples to keep them moisturized even when I was no longer covering them up with gauze. I did wear thin white undershirts (sleeveless a-shirts), though, to keep my nipples and scars protected. I'm still doing that now because it makes things so much more comfortable when I'm wearing button-down shirts.