Nope, I'm afraid not. I used to use them as well. You have to throw them away when they get sticky.
I used the latex nipples cos they were supposed to be more similar to mummy's nipples but I realised that latex nipples are not that safe for long term use cos there is a likelihood that bbs will ingest some unsafe chemicals from it.
You may want to try silicone nipples if your bbs have no prob with the bottle cos silicone ones are the safest so far.