By the third week, I did everything the same except I started soaking in RetainerBrite every other night as opposed to every night.
Well, last night, after I took my aligner off to eat, my brother told me some wretched smell is coming from me and when I asked if it's my breath he said he doesn't know, just knows I smell bad

Then today he didn't comment on my smell or anything, but after I went to take my aligners off again and sat next to him at the table he told me once again that I smell really bad. We ate for an hour and after the meal I asked if my breath still smells and he says it does. I was shocked that my breath still smells even after one hour.
I think it most likely relates to my breath and I think the bad breath actually happens only when I don't have my aligners off. It seems the aligners trap the smell in my mouth and when I take them out the smell is released. Ew. This is really distressing since all my life I've never had any issues with my breath. This is the first time my brother or anyone else complained about my breath.
Anyone with similar experience? How can this be fixed???