Rejecting £1 coins - Faulty Mech???

[vegas7baby]

Hi, can anyone help please. I have Monty Python's Flying Circus by Barcrest, (25p play/£25 Jackpot) which is only accepting around 1 in every 20 pound coins. :x I'm not sure of the Coin Mech model number, but can find out and post later. Does anyone have any idea why it could be rejecting so many. Any suggestions?? Does anyone have a replacement Coin Mech for this particular machine that they would be willing to sell to me. Thanks for your time, and hope to hear from you soon. Kind regards. John

[spa]

Give it a good clean, should sort it.

There's a 'flap' on the mech, pull it back, clean it