Ariston Hotpoint Dryer Isn't Eliminating Odors and Stubborn Stains

I bought an Ariston Hotpoint dryer when I got married in 2018. Ever since then, I've been unhappy with how it's been performing. It can't even get rid of the tiniest stains. Even if I put the dirty laundry in the washing machine right away, the stain still won't come out.

My bed sheets smell really bad from sweat, and even the washing machine can't get rid of it. Lately, my son had a booger incident, and even after washing the sheet, the stain came out of the machine like nothing had happened. I was really surprised; it's just overwhelming.

The warranty is no longer valid, but I really had to tell you about what happened. My light-colored bed sheets and pillowcases have turned bright yellow, especially. It's really terrible; I can't even put it into words for you. I've never been through something like this before.

Whenever I open the drawer where I keep my bed sheets, I'm hit with a really strong smell. I'm not exaggerating. There are two compartments for detergent and one for fabric softener, but you need to use both detergent compartments at the same time. I pour the fabric softener in until it reaches the highest line, but my clothes don't have any scent at all.

The appliance is really low-quality; I wasn't happy with it for even a day.