Fungal Nail Infection - Is there a cure?

I have had fungal nail infection on my two big toenails for about 20 years. It was only on one corner of each nail and stayed that way for years. It now seems to have spread over half of my nail and is now also on my next nail on one foot.

A couple of years ago I tried the Scholl liquid that you had to paint on every day for weeks. It didn't really work.

I paint my toenails to cover them up as they look awful.

I know you can get prescription tablets but I believe they have bad side effects.

Does anyone know of an actual cure - other than the tablets? Would a chiropodist be able to cure it?

Thanks