It will be possible to eliminate the problem through regular use of the CPAP machine and the correct settings for the treatment regimen.
Your attempts to remove the mask from your face indicate that you have not yet fully adapted to the treatment, or the hardware settings are not ideal for you.
There is no point in tightening the straps so that the mask fits more tightly to the face.
So you will only increase the discomfort, and in addition increase the risk of air leaks.
So just try again and again to go to bed with a mask until you develop a habit.