We recommend Ilford Rapid Fixer at 1:1 dilution (50/50) with water due to its low cost and common availability. For best results fix immediately after processing and out of direct light. Minimal exposure to light before fixing is preferred.
A couple minutes in this strong fixer solution should be sufficient time to clear the goo. Then rinse as normal for about 5 minutes, taking care not to abuse the soft emulsion throughout.