To add a note to the cob again, Sitting it out in the sun seems to do the trick all around. Also, before these soured I had ordered Briar Fresh, While it worked for a moment....seems I wasted my time. It does help get a lot of build up out, but...just not for me and didn't remove the sour. Thanks to soul sucking lawyers, money is tight; have resorted to the infamous isopropyl and cotton balls. Has drawn TONS of stuff out already. Which, is hopeful because I'm tired of not having my pipe and can't stand it no more. Will update again, but for others out there, briar fresh is not for this circumstance. Hitting these learning moments hopefully will pay off.