I gave some Dr. Sludges a try for the commute. Was getting to work late too often. Only a 5km route but broken glass everywhere, yet I can do miles in the country no problems of course. Well I got mixed results. They didn't prevent flats; they would *sometimes* stay up after a repump long enough for me to get where I was going.
The real problem I had was the valve on the tube would gunge up with he green fluid and could not be pumped up anymore. They would slowly loose pressure and need to be chucked out eventually.
Any suggestions for sorting these valves out or would I be better just investing more money in a better pair of tyres.