Fighting spam bots in Mautic. What do you use?

Your software
My Mautic version is: 2.15.3
My PHP version is: 7.2.24

Your problem
My problem is: I’ve been using Mautic for 2 years now, and now and then I saw spam bots populating my forms.
I tried the honeypot method for a while, and now I am using reCaptcha.

The problem
Although the reCaptcha solved my spam problem, It slowed down my pages. It’s because I use it in forms present in the footer of my website (all pages), and reCaptcha’s CSS and JS requests are big (and multiple).

What do you use?
Which method do you use? Any ideas to workaround this issue?

Steps I have tried to fix the problem: I did some workaround to load reCaptcha after dom ready, but didn’t really solved the problem, as it still loads and is not deferred.