Reviving suction cups

[Chick-In-Of-TheSea]

I read a comment somewhere that suction cups can be revived by placing them in boiling water for a few seconds. Has anyone ever tried it?  Wouldn't the suction cup melt?

[Guppysnail]

On 10/26/2023 at 9:52 AM, Chick-In-Of-TheSea said:

I read a comment somewhere that suction cups can be revived by placing them in boiling water for a few seconds. Has anyone ever tried it?  Wouldn't the suction cup melt?

I use that. I boil the water and turn the burner off or remove the container of water from the microwave. Then soak the suction cups a few minutes. 
 

The melting point of the material used in suction cups is higher than 212F of boiling water. 

[nabokovfan87]

On 10/26/2023 at 6:52 AM, Chick-In-Of-TheSea said:

Has anyone ever tried it?  Wouldn't the suction cup melt?

I have. It's best to "soak" them in hot water. Clean the glass and then clean the cup so there's no reason for it not to stick. Much like tubing it sort of resets the material and it can be a bit more pliable.

That being said, some materials turn to a rock and it's extremely difficult to bring those back. Eheim Jager heater cups sort of invert themselves and have their own issues, but I've seen and experienced some of the other clear ones that will cure and lose all flexibility.

Soak those, 5-15 minutes and then you might be able to get them to stick once or twice.