sensitive alarm

I recently purchased a 1991 Infiniti Q45. In one week I bought a keyless entry system and also had the hood replaced (in that order). But now the alarm goes off for no reason. Does seem more sensitive when it rains. Am thinking it's somehow connected to the hood. This is my first car (I'm 16) and am still learning A LOT. Any ideas?

Check all of your door, hood and trunk sensors.

Have you replaced your chain guides yet? Might want to look at www.nicoclub.com .