Removing Agitator: Any Ideas for Stubborn Bolt?

Hello -

I have a Kenmore Elite Oasis - Model #11027072602. When doing a load the other day, I encountered the ‘LD’ Long Drain error code. Assuming the issue was related to either a faulty or blocked Drain Pump, I went ahead and ordered a replacement on Amazon for ~$25, just so I’d have the part if needed.

After removing the back sheet metal panel, I was pretty sure I saw some loose articles of clothing through the clear tub - which I thought might be causing the issue. Using a flathead screwdriver, I popped the top portion of the washer (directly below the lid) and unsnapped the several tabs holding the clear plastic tub ring in place. At this point, even if removing the agitator and spin basket WASN’T necessary to remove any stray handtowels or socks that had gotten stuck between the basket and tub (which I think it is), the amount of gunk and just general grossness caked on the tub made me want to remove it so I could give it a good wash.

Problem is, the bolt under the agitator cap won’t budge AT ALL. I’ve tried everything - WD-40, hammering lightly with a mallet to try and unfreeze, speeder bars and regular socket wrenches. The 7/16 bolt just won’t break free.

After hours of trying, I gave up and decided to inspect the pump to see if I could at least get the washer back to a functional state. After setting it on its side, I could immediately see that one of the two blue wires running into the old Drain Pump had jarred free and was just dangling. At that point I decided to just replace the pump (knowing it was 23 years old and probably due), and because I couldn’t get the loose wire to stay in its slot, I soldered both wire connections. Put everything back together and the washer successfully did a self-clean cycle - but I’m definitely still seeing at least 2 hand towels and a sock spinning around the clear tub.

Two questions I’m hoping for help with:

1. How in the world can I remove the stubborn and frozen 7/16 agitator bolt so I can lift the basket and tub?
2. I assume the stray clothing thats between the basket and tub isn’t good for the washer. How critical is it to remove? Will this cause premature wear on the pump? Is there anyway to access the socks/towels withoutremoving the basket?

Thank you!