Yes. I have had some good results with this, basically 40-50% improvement. This has been the only treatment I have tried so far which actually helped significantly. My lip was a crusty mess before and now you can actually see my lip skin. So people who have less severe EC might get better results.
I tried the Biotene Oralbalance Gel and the BioXtra Oral gel and I like the Bioxtra one better, though both do pretty much the same thing.
I think licking your inner lips(labial mucosa) is fine but not the outer lips. Also, if you have dry mucosa then licking them is just going to moisturise them very temporarily while the gel stays on for longer.
I explained how I applied the gel in a prior post which I will just copy and paste here for the sake of ease.:
I am applying the gloves in a bottle roughly once every four days to the entire lip.
I am applying the biotene gel maybe every 20 minutes or so (whenever I feel it wear off, so if you talk for a while you might have to apply it again if it rubs off or you feel it getting dry).
I am applying it to the "labial mucosa" (the inside lining of the upper and lower lips) right up to the wet/dry line (that line where your wet mucosa should end and the
dry vermilion should start). It's quite hard to explain so I uploaded a diagram (I hope this person doesn't mind me using his picture from the gallery):
You can see from this guy's lips that the problem with the crusting is that not only his lips but his mucosa is drying out near the wet/dry border. The EC actually makes it quite difficult to distinguish where the wet mucosa should end and the dry vermilion should begin but you will probably be able to tell on your own lips if you decide to try this method.
I applied a lit bit of the gloves in a bottle with a cotton bud to the dry vermilion just above the "wet/dry" junction once a day, just to make sure I didn't get any of the biotene gel on the dry vermilion (since the gloves in a bottle is like a barrier and it will protect the naturally "dry" vermilion skin from the gel). You should try not to get the biotene on the dry vermilion since it is for use on the mucosa only.
Hope this helps.
Let me know if anything was unclear, and I can try to explain again.
Also, biotene is probably not the only gel suitable for this purpose. There are a lot of saliva gels on the market so if you have different ones available locally then I think it would be fine to try them. You just have to make sure the saliva gel has a good, balanced ph level (and is preferably approved by some kind of independent medical authority).
Also, I checked with a saliva gel company (by writing them an email) that the gel's were suitable for use on the labial mucosa and the company replied that they were. So this method should be safe if you avoid getting the gel on the dry vermilion by using the gloves in a bottle barrier.