This is a very rare event, never happened before. I have had various orchids for a few years, I kept them after they flowered hoping they would flower again, but they never did. This year I put my flowerless and budless orchids on the porch, gave them water once a week as usual and suddenly what did I see. Rows of buds, they had decided to flower again. This is just one plant, but I have three more also with buds.
I have no secret method, it just happened. Of course I am now giving them fertiliser to ensure that the buds stay and develop. I cannot even remember what colour they were.