How to I explain this to DH...

[AlwaysDancing1234]

We have a young baby and I will need to return to work next year so looking at Childcare options.

DH thinks we should ask his (retired) parents to look after our DD
They are good people and clearly love their grandchildren but MIL in particular has very old fashioned ideas on childcare which are a lot different from mine. MIL health also not great.

MIL looked after our older child one day a week when he was a baby/toddler and basically ignored everything I said and did the opposite. It caused a lot of problems and I don't want to ruin the fairly good relationship we have by disagreeing over childcare.

But I just can't get through to DH what the issues could be as he just won't listen, just sees them as cheap easy childcare, HELP!