As the weather got hotter, I noticed a bit more diff fluid escape my vent during track events, like at Sebring for instance, where as I was fine in the spring at VIR, I was fine. The other day, I went to add a pint to be safe. And as I was removing the plug I heard hissing! I removed my vent too and blew through it, then ran some carb cleaner through it to be safe. The problem is, I've done this before for the same problem, and not very long ago. So do I just replace the vent? Or is there a high performance option?