Shocking pen not working..?

i recently bought a electric shocking pen at spencers, and it worked fine the first week or two, but after i put it away and didnt use it for about a week or so, i took it back out to use it, and it won't shock the first time... it takes SEVERAL tries to do it, and sometimes it doesnt even end up shocking.... show more i recently bought a electric shocking pen at spencers, and it worked fine the first week or two, but after i put it away and didnt use it for about a week or so, i took it back out to use it, and it won't shock the first time... it takes SEVERAL tries to do it, and sometimes it doesnt even end up shocking. what's wrong with it?
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