[Jon]

Naiad,

I'd try what Willer said- with either a snorkel or a regulator. It can have plenty of uses for freediving as well as scuba. Here's a shot of Nostres, from last weekend, getting into the "groove" with a little no-mask breathing.

Another thing that I've had students do when first getting used to mask clears is to pinch their nose with one hand while they take their mask on and off with the other.

Jon