Pressing my home button on my iphone4 doesn't minimize apps?

I just purchased a used iphone4 since mine was stolen, however with this new iphone i have now pressing the home button doesn't minimize apps i'm on, like photos or anything, i have to press it multiple times or hold it, is there a setting for this or is my home button broken?

It must be broken, my home button is sh*t but i think thats cos i spilt so many drinks all over it.

Poor iPhone 4.

Must e broken

Broken. Will need a new home button assembly. Most shops will charge between 40-60 to replace. We charge 40.00 locally. Hope this helps.

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