Not the point. OP (it could be a woman) said that it takes weeks to unbind when in fact the half life is 74 mins.
Leaving the house for a few hours a day would be sufficient to "reset" the COHb levels in the blood.
I'm seeing numbers like 320 minutes, 5.3 hours. Of course that's only enough halve it, not clear it completely. Leaving the house for "a few hours a day" sounds like dangerous advice to me.