There's a foul odor in my bathroom which I have not been able to locate its origin. This only started a couple of weeks ago. At first I thought it was from the toilet sewer lines. I resealed the toilet with a wax sealant and placed silicon around the base of the toilet. After about a days, the odor was still there. I checked the sink and shower drains to see if they were coming from there by plugging the drain and placing duct tape run-off valve. The smell went away for a day and thought this was where the smell was coming from, so I cleaned it with bleach, liquid plummer and hot water. This didn't work because I could still smell the odor after a couple of hours. I checked around the toilet for leaks and odor around the base, but couldn't find anything. The water trap for the toilet and sink look okay.
Need help...odor is unbearable.