I have been using this product for about an year and have loved it! I am...

I have been using this product for about an year and have loved it! I am about half way through the tube now. I put the product in my hair just like normal and all of a sudden I started smelling this really potent decay smell. I thought maybe it was just me so I had my husband smell the cream and it also smelled very bad to him as well. The smell unfortunately kept getting stronger leading to me gagging and needing to take two showers to get the smell out of my hair. I use this line of products weekly and have never had any problems until now. The cream is about a year old as it doesn’t take much at a time but please know that it could start smelling really awful.