2 part questions thermostat and steering

[steplift20]

1 is there any way to loosen up the steering I have a no feed back 4.2 turn to turn cable steering I took one nut off and sprayed penertrating fluid it worked the first time but when it got hard I did it again but I couldn't get it loose the secound time
2 I changed my thermostats can I clean and reuse the old ones ?
Thanks for any advise I'm going striper fishing tomorrow I will give you a report Happy thanksgiving