Double balloon enema nozzle: inflating

When you use a double balloon enema nozzle what is your practice of inflating? Do you prefer to inflate before the solution flows or after it starts flowing and then inflate them? Thanks.

Usually before, especially for the first enema I'll inflate before starting the flow … sometimes for the second or third enema I'll start the flow with the DBRN inserted but not inflated, seeing if I can take the enema without the need to inflate.

I normally inflate the distal balloon first, then the exterior balloon, both 5 pumps, then start the enema. This is for a 250/250 latex DBRC.