Anyone know of a good at home straightening treatment?

I dont about home treatments, but striaghtening iron is the most used product for hair straightening, i dont know anything else which may work.

striaghtening iron is ok.
but when you straight hair with home treatment, hair gets more damage. so you'd better go to hairshop and make a hairdresser straight for you.

Straightening - After you wash your hair with a good shampoo and conditioner, allow it to dry completely. Comb the hair well and soak it in a mixture of egg yolk and milk. After the mixture dries up on hair, flip the hairs tight with bobby pins and wash the hair the next day. By doing this your hair would have got soft with the protein mixture and tight flips would have straightened it easily.

Using Curlers – The large rollers can also straighten hair. The big curlers actually straighten the small frizzy curls and make it look straight and hides the splits.

Hair Care Tips While Using A Dry Iron – If planning to use a dry iron, use it only when the hair is completely dry. Ironing needs to be slow and done with care as there is always a chance of it damaging and make the hair look lifeless (due to dryness). You can use water sprays while ironing.

Blow Drying - You can also mix a drop of oil to water and spray the mixture on hair. Blow drying hair can help you get straight hairs very easily.
Oiling hair every alternative day and combing it after application can soften the hair, remove knots and straighten it gradually.
however, hair is still be damaged though cared carefully.
hope you can do it well.
or the simple way is to use a lace wig for yourself.