Make your nail polish liquid again with trind thinnertrind thinner dilutes driedout or syrupy nail polish usually caused by insufficient closing or through evaporation when the bottle is openinstructionadd a few drops trind thinner to the nail polish to make it fluid again shake well use trind thinner only when it is really necessary add at least twenty minutes before using the nail polish never use trind nail polish remover to dilute your nail polish