Try the titanium ones, I was using the EB regular slinkies and faced the same problem as you and I would have to replace them within 2 weeks. After I put on the titanium ones, the strings can last me abt a month to 2 if I seldom play them. All I had to do was to wipe down after I'm done and they'll stay in good cond, plus, they won't lose the tone even after a few weeks. Seems to sound a little better than the normal slinkies.