English: Make sure you flush any caches of 3rd party plugins you're using (e.g. Revolution Slider, WP Rocket, Autoptimize, W3 Total Cache, etc.) to allow %s's optimizations to take effect.
Dutch: Zorg ervoor dat je alle caches van plugins van derden die je gebruikt (bijv. Revolution Slider, WP Rocket, Autoptimize, W3 Total Cache, enz.) opschoont, zodat de optimalisaties van %s effect kunnen sorteren.