No secrets with me TT. It's "Direct Mono". No doubt there will be people who don't like that too. It's all down to personal preference. What works for one person doesn't necessarily work for another.
MAP also make an aerosol (or did) that makes your line float, depending on how much float stuff you do, a can will last a long time. A quick squirt on the spool is usually enough for a session.
Trial and error, try having your line under the water and on top, see what works best for you.