it is better to use a progression, otherwise you will have to much fluctuation in the waves.
As you know as split pays 1:17 right.
Now, when you have played 5 splits without a hit, it's better to stop that session and start a new session with a 1u chip raise. that way you cover your losses better. just my two cents.
spin 1 loss -1
spin 2 loss -3
spin 3 loss -6
spin 4 loss -10
spin 5 loss -15
STOP, start fresh with 2u bet.
Or contunue betting until a hit and take the loss with you to the recovery round.