You shouldn't but if you do, use a low amp setting on your charger, preferably 2 amps or so.

I use the CTek MXS 5.0 charger. Yeah, it's pricey but with the cost of AGM batteries anymore, well worth the money.

The BMK 12V 5A Smart Battery Charger Portable Battery Maintainer isn't a bad unit for half the cost.

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“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now