Now some days ago, Gina brought me some beautiful luffa squashes. They where all green and not the slightest drying yet.
From the info we found we believed we need to dry the whole thing before opening it to get the luffa out.
Luckily yesterday I did a second search and worked out that you can just peel them and wash the slimy stuff out and if needed bleach them, wash them again and then dry them.
These ones where actually starting to get very brown as I tried to dry them close to the oven and the started getting to hot. So some of them were very brown when I peeled them. But the bleach made them look and feel great again.
I saved seeds if anyone is interested.