How to get burnt smell out my hair!!??

I wash my hair only once a week, sometimes twice ( yes once or twice and no I’m not dirty )

Because I have a lot of hair loss and washing it 3-4 times a week will make it worse , anyway whenever I straighten my hair it smells burnt

Even after I wash my hair with shampoo and conditioner it still smells. Even after 2-3 washes the smell doesn’t go away!!

My hair straightener is not cheap

( idk if all hair straighteners leave a smell )

I just need someone to tell me how to get rid of this burnt hair smell off my hair

It’s a turn off for me and my husband lol

Are there any hair creams or something for this ?