This was something I had to get used to with my BCL.
Open cage ='s insta-strike pose and at first occasional strikes at shadows near her cage close to feeding day(a lot of this seemed to be curiosity and just wanting to be prepared as despite being ready to strike she ignored my hand never mistaking it for a prey item). She still has not actually bitten me or even tried. I've never used a towel but, will use a snake hook to re-enforce that the cage is not open for feeding time. She very quickly learned the difference and takes her time in deciding if she should get excited about a meal coming or just chill now.
Keep working with the animal and you will likely have a docile snake in no time.