I find the best way is to put a drop on the sink or something then just touch it with your finger and then rub your finger in the water, even a drop makes a lot of suds which become quite annoying as you can't see!
Jet dry is the US version of what we know as Finish rinse/ drying aid.
You can still find jet dry sometimes at the bargain warehouse places around, the ones that carry overseas branded haircare and cleaning products.
Does the same job in the end as a water dispersant.