Button with bad contact

[exelanoz]

What about replacing with the same button, but this time seal them some how.

Even a "good" switch will fail under the wrong conditions. Some of my stuff is in dusty and caustic environments. Depends on how the switch is constructed, use a rubber boot and some brand of sealant, (polyurethane, enamel, lacquer) electrical supply house will have it.

Hi Mackrackit,
The aquarium timer control sits under the aquarium cabinet that is seperated from the pumps etc. It is surprisingly dry, but I'm convinced it is a dodgy switch. I used these http://www.jaycar.com.au/productView.asp?ID=SP0700
I have used these for other projects and honestly not real happy with them.
Cheers