Digital BW, The Print

Can the CFS carts (1160) from MIS be cleaned out ?

I had an incorrect inkset delivered and 2(C & M)of the 4 inks are 
going to be exchanged.

However, I'd already filled the carts and I had to suck the 2 inks 
back up the tubes with a syringe. I could get most of it out but 
there's a wee bit left.

I had not yet installed the carts and punctured the bottom seals. I 
had top filled via the tubes and vacuum method so the bottoms are 
intact.

If I am replacing the C & M inks and there is a little left in their 
chambers is it best to just leave it and let it mix until it is 
exhausted ? What would you recommend ?

Also, can the tubes be removed from the carts and flushed and 
reattached - with heat or ?

thanks in advance for any tips