How to put hydrogel screen protector on Apple Watch

How to put hydrogel screen protector on Apple Watch.
Price:
www.amazon.com...
The link above is for USA customers.
For Bulgarian customers follow this link:
gps6.bg/gox-pr...
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[@bobaphatt6977]

Just wanted to say thank you. And what is your opinion on which is a better screen protector for you watch, tempered glass or hydrogel?