I've no doubt OoOOoO has sorted his problem one way or another, however for anyone else who has stumbled here with the RM-L03 remote which I seem to have...
The RM-L03 is similar RM-F04 with a slight exception. The top of the remote, as you can probably guess, comes in 2 sections, the black section and the silver section. The silver section goes underneath the black section so you'll need to remove the black section before the silver section. I've attached a photo below (not sure why it's rotated 180 degrees, no matter), hopefully this gives an idea of where the lugs are. I started off by the side of the search button which seemed to flex most.
Mine was playing up exactly the same - the OK button was erratic. Having opened it up and cleaned it, it now appears to be working correctly. I did break the first lug, however given there are a number along the side it's not a big deal. I've also slightly damaged the finish on the side of the remote, that seems hard to avoid so I'd not recommend doing this unless you actually have a problem with the remote, mind, know you know where the lugs are you may get away with less damage.
Jeddy
