Hello and welcome to the forum. Wow 28 years! You must have vast experience re PD! It gives me hope. My husband was diagnosed last summer aged 49 but has probably had PD for a few years.
Apart from saying hello, your question reminded me that back awhile I printed some information off the internet which was put together by a lady who's mother had PD. She wanted to help people with tips and hints re managing the condition without having to trail through loads of info as she had needed to do for her mother. I cant remember who this was unfortunately but could probably find it again with a small amount of searching.
Anyway, sure enough amongst her tips is a paragraph re Drooling so I will copy it out word for word in the hope that it may help your husband and you to find some new ways of managing this problem:
How can you prevent drooling?
People with PD dont have more saliva than people without PD they just swallow less often. As a result of this there ends up being an excess amount of saliva which then often results in drooling.
(there is a bit about Botox injections being approved in USA and to ask doctor if nothing else works..but I read that you have said that isnt an option)
Here are a few suggestions which may help prevent drooling and possibly some embarrassing moments:
.suck on hard candy, lozenges or gum to control excess saliva (if you are not at risk of choking)
.Use a straw when drinking to strengthen the muscles of the lips, mouth and throat
.try to keep your head up and your posture straight because stooping encourages drooling
.swallow first before you talk
.when you're not eating or talking, keep your mouth closed and your lips tight together (people with PD tend to let their jaw drop open which encourages drooling)
.breathe through your nose (~this will help keep your mouth closed which will then help to keep the saliva in your mouth)
.remind yourself to swallow to prevent saliva build up
.you may try rubbing a strong smelling lip balm over your mouth to remind you to swallow
.try putting one or two drops of atropine eye drops (0.5%) under your toungue to reduce the amount of saliva - this works for some people but you should check with your doctor first
that's it....please could I just re-inforce that this is not my advice but just me copying something I read on the internet. I hope you manage to find some useful tips to help your husband.
All the best