How long does it take to heat up? Miguel Fox January 19, 2017 09:41 Updated Follow The brush takes approximately 60 seconds to heat up to the default temperature Of 360°F (180°C). Related articles Can I use the Foxybae Straightening Brush on wet or damp hair? My brush won't turn off How do I change the temperature? How long will it take for my shipment to arrive Any tips and tricks? (for best results) Comments 0 comments Please sign in to leave a comment.