I know a that there's a lot of complaining about Garmin in these forums so I thought I'd share my experience with them.
My 1030 has been displaying the 'halo' effect for a while but on a recent ride I got caught in torrential rain and my display was jumping all over the place as if the rain was causing random touch inputs which it had never done before so I decided to finally call them about it.
I rang Garmin UK on the Tuesday, explained the situation and they agreed to email me a RMA which arrived soon after.
I posted it back to them on Wednesday
Friday morning I received an email confirming that they'd received it followed a few hours later by another confirming dispatch of a replacement!
On Tuesday morning (Monday was a bank holiday) my replacement arrived.
Excellent service Garmin UK
Craig