If yer in the COgr coco, that'll never fully dry out- you want to see a small (5-10%) runnoff every time you water. Designed to be ued w/ auto drip irrigation- most folks hit w/ 50-100ml over several minutes, 2-8 cycle per day. Gotten away w/ handwatering, but would really like daily.

If yer in the BioTerra mix, water it like a potting soil, but try to make sure that you're getting some runoff on a regular basis- maybe hard water once a week, and then as needed other days.

The moment that there is rotting organic material in a planting mix, it becomes soil. You may still want to treat it as soilless, depending on ratios, but technically it's a soil. F'rinstance, I'd go lighter on the N first couple weeks of flower in a mix like that than I would in a straight soilless, as there's slow release N from the FF that you want to get consumed, and you don't want to deal w/ high residual N in late flower.

My $.02 US- not worth much, and losing value every day.