Letter: Fly and ointment

From Mrs BV Sugden

Sir: To avert a recent invasion by mosquitoes of our bedroom, I poured some liquid insect repellent (of a popular brand and meant for human use) on the window sill, only to find that the paint crinkled in front of my eyes, as if I had been applying paint stripper.

Can I assume it must be doing wonders to my ageing skin when applied to my face?

Yours faithfully

BV Sugden

Lasswade, Midlothian