Again, all the signs do not point to the CV system. They point to the short drives, with the engine not getting up to full operating temperature and being kept at that temperature long enough to boil off the condensation. Condensation is natural, as the engine is going through cold/warm cycles several times per day. The condensation from the air collects at the top of the engine. That is where the white paste is coming from.

If you do one or more hot oil changes in quick succession, you will clean the engine out somewhat. That won't in any way clean out the CCV system, as the oil doesn't circulate there, but it will clean out under the valve cover. You should also make a point of getting it good and hot, drive it for an hour or so. Ideally, you should be doing that once per week.

The CV system can be plugged up by the white condensate paste, but it in no way contributes to it. Problems with the CCV are a downstream effect, not an upstream cause.

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