Hey there.
Weston's GTube used to leak all the time. It hasn't since they switched it to an 18 from a 15. It was always red and sometimes smelt very bad. It has also bleed. All I am told is normal. Just keep washing it three times a day they said with reg. soap and water.
I also remember that they told me it may get a yeast infection and told me that I could put nystatin on it. We already had the med. for a yeast infection on his behind though. You would need a script. Also bacitracin I have used in the past to reduce the reddness.
Sometimes West would become leaky when he was getting sick as well. Sorry if this wasn't much help. Good luck!