well looks like you are printing too hot.
Says 200-220c on the reel.

Also is this stuff floppier than the other filaments you've used ?

The cheetah is quite firm. No clue on the yoyi.
It might be worth checking your xtruder is optimised for flexible filaments. Most of the extruders used in makerbot clones are NOT optimised for flexibles.

Also what mm/s speed are you ptinting at ?
Flexibles have to be printed at really slow speeds.

With your setup I'd probably go up to 25mm/s MAXIMUM speed.
The advantage of flexibles is that because they stick so well to just about everything you can print the first layer at the same speed as all the other layers :-)

Also have a look through this: https://3dprintboard.com/showthread....n-instructions