I have discovered that our household vacuum works great to get dust and lint off the convertible top.
Its a canister vacuum (of course, an upright would not be feasible). Just use the small attachment with
the brush. Since the hose is too short to reach the top with the canister on the floor, I hold the canister
in my left hand, drape the hose behind my back and over my right shoulder so it doesn't rub against the
car and hold the end of the hose with the attachment in my right hand. Starting against the windshield
reach out about midway of the roof and drag the attachment end toward you just barely touching the top.

Don't push it - just pull it. Don't want to be overly aggressive. Just repeat this until you've done all of it.

Remember - pull it toward you. Don't push. And use very light pressure.

The pollen in my area is peak and even though the car is garaged all the time, the yellow dust is everywhere.
This is relatively easy and does a great job.