Bread Storage, Explained
Between the starter, the prove and the bake, a homemade loaf is a two-day job. Then it goes hard by Wednesday, not because you did anything wrong, but because real bread has nothing in it to slow the process down.
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You know your loaf is better than anything from the shop. You fed the starter, you let it prove, you watched it through the oven door. Which is exactly why it stings when it goes hard by Wednesday.
Most supermarket bread contains ingredients added specifically to keep it soft for longer. Read the label on a packet of sliced white and you will usually find them.
Your bread has none of that. Flour, water, salt, starter. So it goes stale on the natural schedule: the starch inside it starts re-forming into crystals as it cools, and within a couple of days you can feel it. That is not a flaw in your bake. It is what real bread does.

Sealed in plastic, a homemade loaf sweats and goes mouldy, and without preservatives, it gets there faster than shop bread does. Left in paper or under a tea towel, it dries and goes hard.
On a woven cotton bag it does the same job for a loaf. The cotton breathes; the beeswax lining slows the rate moisture leaves. The inside keeps enough moisture to stay soft, and the crust stays dry enough that it is far less likely to go leathery or grow mould.
Let a homemade loaf cool completely before it goes into any bag, a few hours at least. A warm loaf steams inside whatever it is stored in, the moisture settles on the crust, and that is how bread goes mouldy in a bag that should have kept it.
Your crust stays a crust. The inside stays soft longer. And the loaf you spent two days on gets eaten rather than binned.
One honest note. It works best on a whole loaf you slice as you go. Pre-sliced bread has far more cut surface exposed, and it dries faster whatever you keep it in.

Try it on your next loaf. If it doesn't keep your bread better than what you do now, send it back.

