The trach is changed every 8 weeks. We've been through the infections part quite a lot. It just seems odd that its leaking now. If you have any concern about whether an infection is present, you should contact your doctor. I have a great deal of experience with excessive secretions.
Some people have a tendency more than others to develop secretions.
The main concern is if an infection is present. As I mentioned, some leakage around the stoma is usually normal. Perhaps changing the trach every 4 - 6 weeks may minimize the risk of infection. Also, a suggestion might be to use humidity or a mucolytic to thin the secretions, but once again, consult your doctor. I believe it is better for mucus to come out on the chest rather go into the lungs.