I thought it was a bright idea -

[Graham_Wright]

installing my engine monitoring gauges behind a (fixed) Lewmar window.
Made a tidy job of it.
Two charge ammeters, anchor winch ammeter, oil pressure gauge, water temperature gauge and rev counter.
The window glass misted up. Could see none of them.

 

[Minerva]

Ahh. That’s unfortunate. Any way to increase ventilation behind the window?

 

[Graham_Wright]

Ahh. That’s unfortunate. Any way to increase ventilation behind the window?

I've tried a minicomputer fan without success. Next idea is a small bore hose carrying engine cooling water. Pain to install though.

 

[Boater Sam]

Silica gel crystals?

 

[alahol2]

Try giving it a good polish with Rain-X?

 

[Graham_Wright]

Silica gel crystals?

I hadn't thought of that. I can more or less seal the enclosure so it could well work for a reasonable length of time without regenerating them.
Thanks.

 

[SeasickPete]

I used to use wd40 on a clean rag on the inside of foggy headlights. Perhaps give that a try. It has Water Displacement in the name.

 

[Graham_Wright]

I used to use wd40 on a clean rag on the inside of foggy headlights. Perhaps give that a try. It has Water Displacement in the name.

I suspect it might result in a smeary image but with a try.