Best ultrasonic lp cleaner in 2020 and what surfactant best?

Hi,what cleaning systems have you used previously?Were you able to find a discount?thanks

The detergent that comes with the degritter is excellent. I have used Kodak Photoflow with my DIY ultrasonic tank but the degriiter's detergent  solution really wets the lp very well. 

How does one degas and what does it do?
Thanks

Degassing is nothing more than running the ultrasonic cleaner with no records in it each time you fill the tank with water, prior to starting your record cleaning. It removes oxygen from the water and allows proper ultrasonic cleaning. If you have a unit with the degas feature installed you simply fill the tank and hit the degas button/feature. If not, fill the tank,  turn it on and run it with no records for about 12-15 minutes.

Here is a vote for Perfect Vinyl Forever.
It is an excellent service and will clean your records better than any one machine you put in your home will. You never have to clean them again afterwards, if you take care of them. At worst dust them with a carbon brush. So, expensive, but one time not recurring.