How do I tell my husband things like

"If you put that load on hot water, it will shrink."

"If you put that hot glass pan into the sink full of water, it might shatter."

"If you touch that without removing the fuse first, you will die."

Without "nagging"? I suppose - with the non-fatal stuff - the best thing is to let him do it, and find out for himself that it will ruin/break something, but we really can't afford to replace this stuff. (And I'm not talking "Oh replacing it would mean we can't have fast food one day this month" I mean we are on so tight of a budget right now that there is nowhere to skim to replace things right now and our emergency fund is depleted).

Obviously with housework, I can/should get them done before he has a chance - and usually I do, but every now and then on one of his days off he'll decide to help me, which makes it even worse that I'm nagging! And he wants to be a part of house repairs, which often takes a few days anyway as we wait for a part or etc.

In the end we get things done right and safely but he feels that I am nagging him or arguing. What is the redpill way to say things like this?