I've used Peco Insulfrog turnouts for many years without issue. Since converting to DCC in 2006 I've followed Alan Gartners recommendation to file down the inside of the rails at the frog to prevent a metal wheel bridging across the two rails at the frog. This method does not increase the dead length of the frog or need periodic replacement.

Rod Tonkin

Perth

Western Australia

Fixing Insulfrog shorts ...
http://model-railroad-hobbyist.com/magazine/mrh2018-09/qat

Not that all manufacturers are adjustable, but I'd check anyway. 

Also.. does direction matter?  (Did with one of my Genesis locos!)

Although not that really that feasible after the trackwork is laid, if you treat them as though they were electrofrog, ie put rail insulating rail joiners in the track leading from the frog end of the switch, that would solve the problem.

My solution was to glue a 0.005” shim to the guard rails opposite the frog.

I was impressed with your solution Bill.

Do you still stand by it??

My solution

Sat, 2014-09-20 09:15 — Bill Brillinger

My solution to the same issue was first to paint the frogs - which worked fine until the paint wore off. Then I cleaned off the paint and applied very thin super sticky .03mm sign vinyl to the frogs and they have been no issue ever since.

from: http://model-railroad-hobbyist.com/node/17708

Painted:

         

Vinyl applied:

Hi Bill I know it’s been 6 years since you first posted with your shorting frogs on insulfrog switches, how have you made out with them?
thanks

Lynn

I sure like seeing this pop up again. And I must say for most layouts, your solution or Joe's are great. Permanent? But I'm lucky. I didn't have that many locos or cars to check. I simply eliminated wide wheels. I replaced them. i.e. I carefully inspected my cars and that was far more permanent. LOL Or maybe it's because I bought my turnouts in November 2019. And they had improved a bit by then. Obviously, those of you who have large numbers of cars might balk at the work. I had over 100 and it only took a few days, off and on, between other chores. When I have a tedious job, I do only a bit at a time, say 30 minutes. Do something else and come back. Just what I did and don't mean to say it's the only solution.