CPAPs generally require some experimenting to get working ideally. Pressure setting, mask type, warming temperature, humidity level all come into play. Some experimentation and adjustment may be necessary.

Second, it can take a while (like upwards of a month) to adjust to using one, so patience is advised.

Last, keep who prescribed it informed as to what is happening (even though they can see the reported machine's telemetry) so they can advise/suggest changes.

Hope that helps.