I can only get two to three days out of a nautilus coil as well. I prime, I keep it low watts for the first day and I have a good mod to work with as well a vv twist style batteries. No matter what, two or three days. I won't push you to rebuildables, as I have not gone there either. I have never had any luck cleaning them, putting metal in a microwave doesn't sound all that safe either. I have just resolved myself to changing coils more often and thanking God I don't smoke anymore. coils are way cheaper than cigs...... Now, non nautilus coils from aspire, like for my K1, seem to last and last.