my bong isn’t hitting right

i have this little bong i’ve had for like four to six months and it’s been awesome. but now it’s not hitting right?

i had just cleaned it and i was loading a bowl, and it suddenly wouldn’t hit. like i have to inhale REALLY hard for it to work and it’s kinda uncomfortable?

i experimented with different water levels and nothing worked. if i take the bowl off and inhale with just the bong it feels fine, but once i put the bowl back in it’s wack as fuck.