Lubricating GoPro underwater housing seals

I use a GoPro underwater case for my MAX. After a few days of use on holiday, it has become very difficult to open after short free dives (no deeper than 5m).

My assumption is pressure, even at such shallow depths is causing the seals to contract and causing this tightness. Does anyone have any tricks for getting around this problem?

Is it one like this @HappyMapper?

If so, I know the feeling.

The best I could come up with was to make sure the case is completely dry before you dry to prize it open. Also, the more you use it, the easier it will be to open the case as the case starts to change shape / loosen up with use.

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