Epson XP-900 wireless printer/scanner/copier (Southville BS3)

Epson XP-900 wireless printer/scanner/copier – A3 printer / A4 scanner and copier. Working but the print quality has become very poor with coloured lines across prints – I haven’t been able to work out how to improve it but it maybe that someone else can. 5 individual inks (for photo quality and so you only replace what's actually run out.) With spare unopened photo black ink.