I brewed a few lagers and just left them until fermentation was done. I got sulphur in one and cooked corn in the other. I quit for about 2 years until I tried the fast lager method. I haven't had sulphur or cooked corn since then. I am currently fermenting a lager and now in the ramp up stage - 66 F. The sulphur smell is strong in my fermentation fridge and I am confident it will all be gone when fermentation is done.