Readers’ tips

Dear Debora,

The very best grout cleaner is Kiwi Whitener, for sports shoes and trainers. Just scrub the grout with an old toothbrush with your preferred cleaner, squeeze the trainer whitener along the grouting – it even comes with its own applicator. Use your finger to push into awkward corners, then leave to dry for 30 minutes. Wipe with a damp cloth, then polish with a dry cloth.

– Sylvia Shaw, Gerrards Cross, Buckinghamshire