We purchased a home back in July and recently had our septic system back up. We had the septic pumped and all seems to be working well, except for one small annoyance. The bathroom off of the master bedroom has a very strong odor (sewage) and we cannot pin point where the odor is coming from (the toilet or the shower stall). We replaced the wax ring on the toilet in hopes that we could create a better seal, but that has not helped the situation. Any ideas on why we have this odor and what we can do about it?