Re: 21 & 23
#21:
There're no specific plans that I'm aware of as there's no way to know when travel will become advisable. However, there seems to be a general consensus that we'll need at least one once we're past this current crisis.
#23:
The bottom sheets have body weight on them so there's much more physical abrasion sop they'll show wear sooner. Not much to be done about that.
I remember being sort of stuck with the same situation but I don't think it was sheets. I'd wash the 'clean' sheets with a cup of ammonia. I think I used 2 cups but that might've been too strong (expert opinion, please?) and I was just lucky. Anyway, full cycle with just ammonia , no detergent and do an extra rinse. Then do the same but use 2 cups of vinegar instead of ammonia. That should wash out any residual detergent and dirt possibly trapped within. I'd use the hottest water you're comfortable with.
That might do the trick. If not, at least you'll have a more accurate picture of the dinginess.
One thing that has worked when nothing else has is Didi7. I know a lot of people tend to roll their eyes but I've had it work miracles just like in their commercials years ago. If you're dealing with general dinginess and not a specific stain, I'd dissolve the Didi7 FULLY in a cup of hot water and use that in place of detergent. The directions tell how much to use for a TL, I've forgotten what, but that's what I followed.
Hope this helps,
Jim