Does anyone know how to have dry orgasms ?

When I use my helix syn, it’s easy for me to have normal wet orgasm. But I keep reading stories of people having multiple dry orgasms. I just want to know if there is a technique or something. Like, can someone explain to me in detail how they end up achieving a dry orgasm. Just so people know, I flex my pc muscles while moving my hips and I keep going faster and harder until I cum. Is there something wrong with my technique ?