a warm bath might help the mucus come out - my 8mth old is in a similar situation. i use the suction tubes (japanese brand - you can buy at sogo) before bed time and meal time so she can sleep / feed better. it might seem painful when you use it but in fact it loosens things up for her....
also, for night time, I lie her on her belly to sleep (as opposed to on her back - her usual position) so that the mucus flow out and not into the back of her nose and build up making it hard to breathe.
also, for night time, I lie her on her belly to sleep (as opposed to on her back - her usual position) so that the mucus flow out and not into the back of her nose and build up making it hard to breathe.