I bought a house that had a freezer in the basement full of meat shut off for two months the guy I bought for it from didn’t think to refreeze then remove it . He dropped it on the down the steps and spilled its contents on the concrete floor i scrubbed that floor repeatedly for months and one day after using all the bleach in the house and still smelling rotten meat I just dumped every cleaner we had on the floor and started mopping . After a few minutes I noticed a smoky haze coming off the floor and my chest felt tight and sore so I left all the windows and doors open and took my wife out for the night. Ever smelled rotten meat in the basement again but it’s been 10 years and I still feel like I can get a full breath of air