Getting LESS used to CPAP with time

I got my CPAP (AS 11 Autoset with Philips Dreamwear nasal) about 5 weeks ago for UARS and the first 4 weeks went almost flawlessly. Used it the whole night every day without fail. Didn't bug me much. After washing the mask and putting it back together somehow it bothers me to the degree that I have trouble falling asleep; and I keep trying to adjust the straps. I've had some stressful days, but I feel without the mask I still fall asleep okay.

Any advise? Similar experiences?