Michael, I've found it weeps and oozes out for many years. It is still doing it around the waste line of our 2017 van.
Dampen a rag with White Spirit, not Meths as it may dissolve the paint on dimpled vans, and give a good wipe. Use an old credit card to cut through the sealant and roll up like a ball of snot. Wipe area repeatedly with the clean spirit dampened rag, repeating as required. Do not be attempted to pull the sealant out. When you are happy give a good wash with soapy water and apply some car polish to bring the shine back on your paintwork.

A few weeks ago I did this on my van and whilst at it used a toothbrush and white spirit to clean the white rubber trim on the waist line. I then used a nail brush and soapy water. It has come up a treat.

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Colin