Problem while updating a sharepoint 2013 webpart (wsp)

Question

I have created a solution that includes Sharepoint 2013 web parts using visual studio 2013.

But after updating the web part and redeploying the solution, all the changes in the web part are gone. I’ve tried to desactivate and reactivate the features but the problem still remains.

What should i do to see the new updates?

Regards,