Nylon doesn't corrode. A new set takes a couple weeks to stay in tune, but they last longer than steel strings. The winding on the wound strings will corrode, but they still last a long time. Only put nylon strings on a guitar made for nylon strings. You will cause damage with steel strings. Nylon strings last longer than Elixir steel strings anyway. I don't mind changing strings, except a slotted headstock.
So, I cut the old ones off. It's the easiest way I've found. Tie on the new strings and keep tuning for 1 to 2 weeks before they really settle in. At 2 weeks I want to change steel strings, but I can't always afford too do so. When I performed live my strings lasted for 1 or 2 nights. I'd buy a dozen sets at a time. Sadly, Our budget makes strings a low priority right now.
Just for your interest, I notice that you are displaying some tension in both hands - and in particular, to the right hand pinky.
When a neophyte is watching your playing, they may also adapt to the actual positions of the hands.
Other the other hand, https://www.youtube.com/watch?v=xmqR93Us4SI