There are just a few things you should know how to work:

1
You can pay with a previous payout ticket, your member card, or cash. ...
2
Most machines no longer spit out coins. ...
3
For certain variations of games, the methodology is spelled out on the glass above the screen. ...
4
Each machine has a light on top of it called a 'candle'.

Here's more about each of those 10 best high RTP slots along with information about where you can play them.

Mega Joker  99% RTP. ...
Codex of Fortune  98% RTP. ...
Starmania  97.87% RTP. ...
White Rabbit Megaways  97.72% RTP. ...
Medusa Megaways  97.63% RTP. ...
Secrets of Atlantis  97.07% RTP. ...
Steam Tower  97.04% RTP.