I tried a spirometer/breathing exercise device once, but the drool factor was too much to handle (ie, a few minutes using it and I had puddles of drool to sop up with paper towels). How does this device compare?
I tried a spirometer/breathing exercise device once, but the drool factor was too much to handle (ie, a few minutes using it and I had puddles of drool to sop up with paper towels). How does this device compare?