The preparation of pre cleaned coverslips involves several steps to ensure their cleanliness. Typically, they are washed in a series of solutions, including detergents and solvents, to remove any organic and inorganic contaminants. After washing, they are rinsed thoroughly with deionized water and sometimes treated with acid to eliminate any remaining residues. Finally, the coverslips are dried and handled in a clean environment to prevent re-contamination.