Question:
Goal: How to ensure windows stay clean over a long period of time?

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
Use a sealant and apply to the window surface every week or so

Question:
Goal: How to protect table from glue

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
Lay down newspaper on table before starting.

Question:
Goal: handkerchief

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
can be used as a flag