My Ford Excursion 2002?

my car alarm has never worked before. I washed the car the other day and wiped the inside of it with a wet towel. Now when ever i go to open the door the alarm goes off. But then when i leave the door closed for a certain time i think that the alarm engages by itself. And i forget that the alarm is on. And now the alarm is super sensative, if you touch it, if you bump it, or if you open the door. And also when i go use the keypad to unlock it, the first digit ( which is right ) makes the alarm go off. And it is really loud. Its just weird because its never done that before. And it might me the make of the car too?
 
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