tl;dr: Questions asking how to preserve food are looking for common solutions to common problems, therefore they're not looking for Lifehacks, therefore they fall outside of our scope.
We've had a few questions over the months which are asking how to preserve food. I've posted a few of them below, but there's probably a couple I've missed.
How do I decelerate the ripening of bananas?
How to keep bread fresher for longer
How can I keep cookies from going stale as long as possible?
How to make washed fruit last longer in the refrigerator?
As of this posting, all of these questions are open. However, I believe they should all be closed, because asking how to preserve food doesn't fall within our scope.
From our On-Topic page:
Lifehacks is a place to ask about seemingly intractable, stubborn problems that need a bit of thinking "outside the box". If our question is…
- seeking uncommon solutions to common problems;
- asking for unusual ways of using everyday objects to achieve a certain task or solve a specific problem;
- looking for simple and practical tips to life's everyday problems that may not have an obvious solution
Food preservation questions fail to meet any of these criteria. They're looking for common solutions to common problems, they're not asking for unusual ways to use everyday problems, and the methods for preserving food are obvious.
The list of things Lifehacks isn't about is listed further down on the on-topic page, and it reads:
and it is NOT about…
- conventional "how to…" questions about skills that can commonly be learned elsewhere;
- using products in the way they were designed to be used (e.g. keyboard shortcuts, obscure features, how to get your smartphone to do {x});
- "mind hacks" including personal productivity & self-improvement tips, memorization & learning techniques, etc;
- contrived challenges that reject easy and readily available solutions simply to make the problem "more interesting"
Of these four items, the first two apply. Methods for preserving food can easily be learned by looking around on the internet (Wikipedia has a fairly lengthy page on a whole bunch of different food preservation methods), and the methods for preserving food are just using products in the way they were intended.
Finally, at the end of our on-topic page is the following:
Lifehacks SE is NOT a place to ask your everyday "how to…" questions. If your question amounts to learning a craft, or gaining some expertise in a skill you simply do not possess, your question may not be on topic here.
This rule applies here. Food preservation is an everyday problem people face, but its not something that requires a Lifehack. Therefore, food preservation questions should be off-topic.
Remember, we're Lifehacks.SE not EverydayLiving.SE.