What's the best treatment to get rid of dyslexia?

No cure. Dyslexia is a condition where the brain mixes up signals it receives. This causes a jumbling and/or reversal of letters and numbers, difficulty remembering sequential information, etc. There is no definitive cure for it. Folks diagnosed with it are trained to recognize it and adapt to it. They are often of average to above-average intelligence and do very well with the proper help.
Speech and language. Speech and language thereapists and specific reading specialists use a variety of teaching programs such as Orton Gillingham, Wilson and others.
Different. There are several different forms of dyslexia which ultimately is difficulty with reading comprehension. Proper diagnosis allows for correct teaching of different ways to process the information and then "read". So it really can be " corrected".