Loon

can someone help me.. my boost gauge is acting up... heres the story i got a greddy boost gauge its the one with the warning light and memory... i think its the electric one but anyways.. it rained like a week ago and its been acting up eversince.. the vacuum reading for it comes out to like 700 but on my vafc it says like 500 so then i was like wtf.. so then i borrowed my friends boost gauge and just connected it and it read 500 like the vafc... so then i knew it was the boost gauge... and also b4 the rain when i high boosted it was 1.0 bar now when i high boost its .4 but i know im high boosting cause like i said i used my friends boost gauge... i was wondering if theres a way to fix it.. or do i have to toss it and get a new one.. help please.. thanks guys...