Break fluid

[SIVA]

Hello Rad people

I have been enjoying a Radrover 6+ for the last two years. I recon the break levers have to be pressed than usual to get a good breaking or pump the leaver few times before i get a good breaking. I realize there come the time to bleed the break line to remove air in the line. I have looked in the net and have a good idea how to do that. My question is what type of oil Rad bikes use? i sent an email to support they have not answered my question instead they want me to look at break adjustment and all that. They also mentioned they DO NOT sell a break fluid flush kit. Their suggestion is to take it to a bike repair shop. I am not really sure if there is a reliable place near i live. I will greatly appreciate your input

[handlebar]

https://www.radowners.com/index.php?topic=2089.0

I don't know if you have Nutt brakes. This thread has links for videos using mineral oil for Nutt brakes.