Try giving up all dairy food - milk, cheese, yoghurt, custard, ice cream, whatever. See if that helps to dry up the fluid from the inside.
If I have a milk shake or ice cream or even cheese sandwiches, I get a mucus build-up that sets off ringing in my ears, I get a sore throat and my balance goes haywire. It took years of suffering before I discovered I was intolerant to any dairy product.
The 'cure' is so easy (well, not so easy when everyone else is having ice cream or Camembert cheese!) Give it a try for a week or so - see if it works for you.
Cheers,
Robyn