Girls, I need your help ?? We've been at it for 1.5 months, he snuffle…

Girls, I need your help ?? We've been at it for 1.5 months, he snuffles his nose ?, struggles to breathe, like something is blocking his nose with mucus, I drip saline into his nose every day, slowly removing mucus with a suction device. But sometimes the mucus doesn't come out... sometimes it goes down, I've tried bulb syringes, but I can't get them to work, The suction device also isn't always reliable, I'm afraid of damaging the septum. How do you clean your nose? Share your tips.