Genial.ly embedding in Rise

A question for those of you who use Genially in Rise.

What iframe parameters are you using to embed your interactive content? Sometimes I find the text appears blurry, but I am not sure what width, height or max width to set.

I have set the height to match the size of the Genially, but this doesn't help.

<iframe src="https://view.genially.com/6720c5563ae8449b359f1fd0" width="100%" height="600px" style="max-width: 100%; border: none;"></iframe>

Any advice would be appreciated.