Have mixed feelings about black/blue markings on taps (4,3,3,4)
I believe the answer is:
blow hot and cold
'have mixed feelings about' is the definition.
(to blow hot and cold is to change your opinion)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for blow hot and cold that I've seen before include "as will the sirocco and mistral?" , "not steady" , "Be inconsistent" , "Be unable to decide" , "Unpredictably, swing" .)