Old foam turned to goo on the left, on the right after a bit of work it's gone.

The rail slots are clean, next it's time to tackle the dreaded prism foam.

The foam is really stuck on the flash socket bracket, on the right it's after careful cleanning.

Now it's time to refoam, rail slots first.

On the right the difference between the top empty rail slot and the refoamed bottom slot.

All done!

And ready to use again. The best and most affordable foam kits are sold by eBay seller interslice. They come with complete instructions and a small bamboo tool to remove old foam.