It is essentially impossible to get rid of spider mites for good. We always have to be on the watch and we always have to be prepared to deal with them. They linger on all your plants, even if they don't cause trouble for some of them.
Many house plants arrive with spider mites that are not a significant problem for that particular plant. Some plants are highly susceptible - the Catasetinae orchid tribe is among these plants.
__________________ May the bridges I've burned light my way.