Yes. Buy another one, or use a cheap and reliable beanbag (not as versatile though)
They're non serviceable and work entirely on friction. It's quite likely that the heat of Egypt has expanded some of the plastic joints and over time fine dust and grit will have worn down the joint tolerances just enough to make the joint actions too loose for your current needs. You may be able to retire it for use with lighter compact cameras though or to mount remote flashguns upon.
I've been a fan of Gorillapods for a couple of years as well and have worn out a few of them: I've found that the next size up from the one Joby advise you to use does a far better job and lasts much longer, so my SLR cameras now have the Gorillapod Focus
dangling underneath. (n.b. the link is just for convenience, I found my last two cheaper than Amazon prices).
As a quick fix, you might want to carry a can of hair spray with you. An occasional spraying of a sloppy Gorillapod will keep it going just long enough to last out your trip. But spray the tripod only when all your optical equipment is tucked well away in your gadget bag.