Some more comments. The only laminate German stocks that will delaminate from water are the late-war white glue laminates. The red glue laminates will withstand water just fine.
Be VERY careful with oven cleaner. Some woods will chemically react with it and turn the stock a sh!tty orange color, and it can/will also weaken wood fibre if left on too long. I would use it only on the absolute WOSRT stocks that I couldn't make right any other way.
Bar none, the best method is to wrap in paper towel and allow the greenhouse effect to take hold. I knew a guy once who built a black painted box with a window on top for hot sunny days to treat his stocks. This method, while being the best, takes weeks or even months. That's why it's not very popular.
DO NOT soak a stock in a bin of water. This WILL worsen cracks and raise out your cartouches.
Hot water with or without TSP will work quite well, but don't overdo it! You only want enough hot water to liquify surface oil so the scrub brush will take it off. Let the TSP do its thing to leech the oils out from underneath the wood's surface. Brushing water on is no different than if your stock was rained on. It won't absorb enough water to worsen cracks, etc. This is because you aren't dunking end-grain into a bucket of water
Let any washed stock sit for a week in a dry warm room, just to be safe, before you oil it. You don't want to trap moisture into the stock.
I can't stress this enough though - don't use oven cleaner unless you've exhausted every other method. I've seen some VERY valuable stocks ruined with this stuff FIRST HAND. It will turn mahogany Enfield stocks into useless mush. Some strains of beechwood will come out looking like hairy ####. And also, it can react with some older oil wood finishes too and ruin stock coloration on things like WW1 era USGI 1903 Springfield stocks.