Iphone 4 home button not working prperly

My home button has been failing lately i've done a little research on the internet and something that worked but just for a couple mins was a step where you have to plug in the usb cable and the push upwards and the push the home button one time when i do it it seems to work for a couple minutes but then back again to what it was. I tried to use it with the usb cable doing a little pressure upwards  and i realize that as long as i keep making a litle pressure it works just fine. What can i do about this ?